91351032432 has 80 divisors (see below), whose sum is σ = 257618475648. Its totient is φ = 27663351040.

The previous prime is 91351032403. The next prime is 91351032439. The reversal of 91351032432 is 23423015319.

It is a super-2 number, since 2×91351032432² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 91351032393 and 91351032402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91351032439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 730363 + ... + 846245.

Almost surely, 2^91351032432 is an apocalyptic number.

It is an amenable number.

91351032432 is an abundant number, since it is smaller than the sum of its proper divisors (166267443216).

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

91351032432 is a wasteful number, since it uses less digits than its factorization.

91351032432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117398 (or 117392 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The spelling of 91351032432 in words is "ninety-one billion, three hundred fifty-one million, thirty-two thousand, four hundred thirty-two".