91998151245 has 384 divisors, whose sum is σ = 225548144640. Its totient is φ = 34734458880.

The previous prime is 91998151243. The next prime is 91998151367. The reversal of 91998151245 is 54215189919.

91998151245 is a `hidden beast` number, since 9 + 1 + 9 + 9 + 81 + 512 + 45 = 666.

It is not a de Polignac number, because 91998151245 - 2¹ = 91998151243 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91998151191 and 91998151200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91998151243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 81485841 + ... + 81486969.

It is an arithmetic number, because the mean of its divisors is an integer number (587364960).

Almost surely, 2^91998151245 is an apocalyptic number.

It is an amenable number.

91998151245 is an abundant number, since it is smaller than the sum of its proper divisors (133549993395).

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

91998151245 is a wasteful number, since it uses less digits than its factorization.

91998151245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247 (or 1235 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 54.

The spelling of 91998151245 in words is "ninety-one billion, nine hundred ninety-eight million, one hundred fifty-one thousand, two hundred forty-five".