9091979136 has 96 divisors (see below), whose sum is σ = 27132214200. Its totient is φ = 3030649344.

The previous prime is 9091979131. The next prime is 9091979153. The reversal of 9091979136 is 6319791909.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9091979131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115051 + ... + 177258.

Almost surely, 2^9091979136 is an apocalyptic number.

9091979136 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

9091979136 is an abundant number, since it is smaller than the sum of its proper divisors (18040235064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9091979136 is an equidigital number, since it uses as much as digits as its factorization.

9091979136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292338 (or 292314 counting only the distinct ones).

The product of its (nonzero) digits is 826686, while the sum is 54.

The square root of 9091979136 is about 95351.8701232440. The cubic root of 9091979136 is about 2087.1459051397.

The spelling of 9091979136 in words is "nine billion, ninety-one million, nine hundred seventy-nine thousand, one hundred thirty-six".