91648751506 has 32 divisors (see below), whose sum is σ = 151510867200. Its totient is φ = 41320964160.

The previous prime is 91648751503. The next prime is 91648751549. The reversal of 91648751506 is 60515784619.

It is not an unprimeable number, because it can be changed into a prime (91648751501) 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, 26526 + ... + 428953.

It is an arithmetic number, because the mean of its divisors is an integer number (4734714600).

Almost surely, 2^91648751506 is an apocalyptic number.

91648751506 is a deficient number, since it is larger than the sum of its proper divisors (59862115694).

91648751506 is a wasteful number, since it uses less digits than its factorization.

91648751506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455674.

The product of its (nonzero) digits is 1814400, while the sum is 52.

The spelling of 91648751506 in words is "ninety-one billion, six hundred forty-eight million, seven hundred fifty-one thousand, five hundred six".