91992053672 has 8 divisors (see below), whose sum is σ = 172485100650. Its totient is φ = 45996026832.

The previous prime is 91992053653. The next prime is 91992053711. The reversal of 91992053672 is 27635029919.

It can be written as a sum of positive squares in only one way, i.e., 52627112836 + 39364940836 = 229406^2 + 198406^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5749503347 + ... + 5749503362.

Almost surely, 2^91992053672 is an apocalyptic number.

It is an amenable number.

91992053672 is a deficient number, since it is larger than the sum of its proper divisors (80493046978).

91992053672 is a wasteful number, since it uses less digits than its factorization.

91992053672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11499006715 (or 11499006711 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 53.

The spelling of 91992053672 in words is "ninety-one billion, nine hundred ninety-two million, fifty-three thousand, six hundred seventy-two".