91238623051 has 8 divisors (see below), whose sum is σ = 91309293504. Its totient is φ = 91167983040.

The previous prime is 91238623039. The next prime is 91238623081. The reversal of 91238623051 is 15032683219.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91238623051 - 2³⁵ = 56878884683 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91238622995 and 91238623013.

It is not an unprimeable number, because it can be changed into a prime (91238623081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13290846 + ... + 13297708.

It is an arithmetic number, because the mean of its divisors is an integer number (11413661688).

Almost surely, 2^91238623051 is an apocalyptic number.

91238623051 is a deficient number, since it is larger than the sum of its proper divisors (70670453).

91238623051 is a wasteful number, since it uses less digits than its factorization.

91238623051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15221.

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 91238623051 in words is "ninety-one billion, two hundred thirty-eight million, six hundred twenty-three thousand, fifty-one".