91722193038 has 48 divisors (see below), whose sum is σ = 227183723520. Its totient is φ = 26199175248.

The previous prime is 91722193037. The next prime is 91722193117. The reversal of 91722193038 is 83039122719.

It is a junction number, because it is equal to n+sod(n) for n = 91722192984 and 91722193002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91722193033) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 371943 + ... + 567261.

It is an arithmetic number, because the mean of its divisors is an integer number (4732994240).

Almost surely, 2^91722193038 is an apocalyptic number.

91722193038 is an abundant number, since it is smaller than the sum of its proper divisors (135461530482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91722193038 is a wasteful number, since it uses less digits than its factorization.

91722193038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199061 (or 199058 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 91722193038 in words is "ninety-one billion, seven hundred twenty-two million, one hundred ninety-three thousand, thirty-eight".