61571012503 has 80 divisors (see below), whose sum is σ = 85678600000. Its totient is φ = 43055400960.

The previous prime is 61571012491. The next prime is 61571012509. The reversal of 61571012503 is 30521017516.

It is not a de Polignac number, because 61571012503 - 2²⁵ = 61537458071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61571012509) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 49295623 + ... + 49296871.

It is an arithmetic number, because the mean of its divisors is an integer number (1070982500).

Almost surely, 2^61571012503 is an apocalyptic number.

61571012503 is a deficient number, since it is larger than the sum of its proper divisors (24107587497).

61571012503 is a wasteful number, since it uses less digits than its factorization.

61571012503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350 (or 1317 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 31.

The spelling of 61571012503 in words is "sixty-one billion, five hundred seventy-one million, twelve thousand, five hundred three".