91550420232 has 32 divisors (see below), whose sum is σ = 229884328800. Its totient is φ = 30382369664.

The previous prime is 91550420201. The next prime is 91550420233. The reversal of 91550420232 is 23202405519.

It is a junction number, because it is equal to n+sod(n) for n = 91550420193 and 91550420202.

It is not an unprimeable number, because it can be changed into a prime (91550420233) 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, 8396757 + ... + 8407652.

It is an arithmetic number, because the mean of its divisors is an integer number (7183885275).

Almost surely, 2^91550420232 is an apocalyptic number.

It is an amenable number.

91550420232 is an abundant number, since it is smaller than the sum of its proper divisors (138333908568).

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

91550420232 is a wasteful number, since it uses less digits than its factorization.

91550420232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16804645 (or 16804641 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 91550420232 in words is "ninety-one billion, five hundred fifty million, four hundred twenty thousand, two hundred thirty-two".