91520534902 has 16 divisors (see below), whose sum is σ = 144540676800. Its totient is φ = 43341461640.

The previous prime is 91520534873. The next prime is 91520534947. The reversal of 91520534902 is 20943502519.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125952 + ... + 445987.

It is an arithmetic number, because the mean of its divisors is an integer number (9033792300).

Almost surely, 2^91520534902 is an apocalyptic number.

91520534902 is a deficient number, since it is larger than the sum of its proper divisors (53020141898).

91520534902 is a wasteful number, since it uses less digits than its factorization.

91520534902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576171.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 91520534902 in words is "ninety-one billion, five hundred twenty million, five hundred thirty-four thousand, nine hundred two".