91938463730 has 64 divisors (see below), whose sum is σ = 177921612288. Its totient is φ = 34125442560.

The previous prime is 91938463723. The next prime is 91938463739. The reversal of 91938463730 is 3736483919.

It is a super-2 number, since 2×91938463730² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91938463739) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 979307 + ... + 1069073.

It is an arithmetic number, because the mean of its divisors is an integer number (2780025192).

Almost surely, 2^91938463730 is an apocalyptic number.

91938463730 is a deficient number, since it is larger than the sum of its proper divisors (85983148558).

91938463730 is a wasteful number, since it uses less digits than its factorization.

91938463730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89931.

The product of its (nonzero) digits is 2939328, while the sum is 53.

The spelling of 91938463730 in words is "ninety-one billion, nine hundred thirty-eight million, four hundred sixty-three thousand, seven hundred thirty".