64786481490025 has 9 divisors (see below), whose sum is σ = 80335286951493. Its totient is φ = 51829152996000.

The previous prime is 64786481489981. The next prime is 64786481490037. The reversal of 64786481490025 is 52009418468746.

The square root of 64786481490025 is 8049005.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 10203405552729 + 54583075937296 = 3194277^2 + 7388036^2 .

It is not a de Polignac number, because 64786481490025 - 2²³ = 64786473101417 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 39440125 + ... + 41049925.

Almost surely, 2^{64786481490025} is an apocalyptic number.

64786481490025 is the 8049005-th square number.

64786481490025 is the 4024503-rd centered octagonal number.

It is an amenable number.

64786481490025 is a deficient number, since it is larger than the sum of its proper divisors (15548805461468).

64786481490025 is an frugal number, since it uses more digits than its factorization.

64786481490025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3219612 (or 1609806 counting only the distinct ones).

The product of its (nonzero) digits is 92897280, while the sum is 64.

The spelling of 64786481490025 in words is "sixty-four trillion, seven hundred eighty-six billion, four hundred eighty-one million, four hundred ninety thousand, twenty-five".