91530752638 has 32 divisors (see below), whose sum is σ = 150030720000. Its totient is φ = 41626162656.

The previous prime is 91530752581. The next prime is 91530752653. The reversal of 91530752638 is 83625703519.

It is a junction number, because it is equal to n+sod(n) for n = 91530752591 and 91530752600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 980295 + ... + 1069597.

It is an arithmetic number, because the mean of its divisors is an integer number (4688460000).

Almost surely, 2^91530752638 is an apocalyptic number.

91530752638 is a deficient number, since it is larger than the sum of its proper divisors (58499967362).

91530752638 is a wasteful number, since it uses less digits than its factorization.

91530752638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89896.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The spelling of 91530752638 in words is "ninety-one billion, five hundred thirty million, seven hundred fifty-two thousand, six hundred thirty-eight".