91357614772 has 6 divisors (see below), whose sum is σ = 159875825858. Its totient is φ = 45678807384.

The previous prime is 91357614731. The next prime is 91357614847. The reversal of 91357614772 is 27741675319.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 56550742416 + 34806872356 = 237804^2 + 186566^2 .

It is a super-2 number, since 2×91357614772² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 11419701843 + ... + 11419701850.

Almost surely, 2^91357614772 is an apocalyptic number.

It is an amenable number.

91357614772 is a deficient number, since it is larger than the sum of its proper divisors (68518211086).

91357614772 is a wasteful number, since it uses less digits than its factorization.

91357614772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22839403697 (or 22839403695 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 52.

The spelling of 91357614772 in words is "ninety-one billion, three hundred fifty-seven million, six hundred fourteen thousand, seven hundred seventy-two".