81120958970 has 16 divisors (see below), whose sum is σ = 146253630240. Its totient is φ = 32395960464.

The previous prime is 81120958939. The next prime is 81120958973. The reversal of 81120958970 is 7985902118.

It is not an unprimeable number, because it can be changed into a prime (81120958973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6546392 + ... + 6558771.

It is an arithmetic number, because the mean of its divisors is an integer number (9140851890).

Almost surely, 2^81120958970 is an apocalyptic number.

81120958970 is a deficient number, since it is larger than the sum of its proper divisors (65132671270).

81120958970 is a wasteful number, since it uses less digits than its factorization.

81120958970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13105789.

The product of its (nonzero) digits is 362880, while the sum is 50.

The spelling of 81120958970 in words is "eighty-one billion, one hundred twenty million, nine hundred fifty-eight thousand, nine hundred seventy".