91490950152 has 120 divisors (see below), whose sum is σ = 289069334190. Its totient is φ = 26140222080.

The previous prime is 91490950129. The next prime is 91490950153. The reversal of 91490950152 is 25105909419.

91490950152 is a `hidden beast` number, since 9 + 1 + 4 + 90 + 9 + 501 + 52 = 666.

It can be written as a sum of positive squares in only one way, i.e., 87998849316 + 3492100836 = 296646^2 + 59094^2 .

It is a junction number, because it is equal to n+sod(n) for n = 91490950098 and 91490950107.

It is not an unprimeable number, because it can be changed into a prime (91490950153) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 91749 + ... + 437492.

Almost surely, 2^91490950152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91490950152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144534667095).

91490950152 is an abundant number, since it is smaller than the sum of its proper divisors (197578384038).

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

91490950152 is a wasteful number, since it uses less digits than its factorization.

91490950152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529281 (or 529253 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 45.

The spelling of 91490950152 in words is "ninety-one billion, four hundred ninety million, nine hundred fifty thousand, one hundred fifty-two".