91204954650 has 72 divisors (see below), whose sum is σ = 250250929344. Its totient is φ = 23803840800.

The previous prime is 91204954597. The next prime is 91204954669. The reversal of 91204954650 is 5645940219.

91204954650 is a `hidden beast` number, since 9 + 12 + 0 + 49 + 546 + 50 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 91204954596 and 91204954605.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2134996 + ... + 2177295.

It is an arithmetic number, because the mean of its divisors is an integer number (3475707352).

Almost surely, 2^91204954650 is an apocalyptic number.

91204954650 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

91204954650 is an abundant number, since it is smaller than the sum of its proper divisors (159045974694).

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

91204954650 is a wasteful number, since it uses less digits than its factorization.

91204954650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4312356 (or 4312348 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 91204954650 in words is "ninety-one billion, two hundred four million, nine hundred fifty-four thousand, six hundred fifty".