91402026915 has 16 divisors (see below), whose sum is σ = 146255172768. Its totient is φ = 48743771136.

The previous prime is 91402026913. The next prime is 91402026949. The reversal of 91402026915 is 51962020419.

It is not a de Polignac number, because 91402026915 - 2¹ = 91402026913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91402026913) 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 15 ways as a sum of consecutive naturals, for example, 53592 + ... + 430901.

It is an arithmetic number, because the mean of its divisors is an integer number (9140948298).

Almost surely, 2^91402026915 is an apocalyptic number.

91402026915 is a deficient number, since it is larger than the sum of its proper divisors (54853145853).

91402026915 is a wasteful number, since it uses less digits than its factorization.

91402026915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497078.

The product of its (nonzero) digits is 38880, while the sum is 39.

The spelling of 91402026915 in words is "ninety-one billion, four hundred two million, twenty-six thousand, nine hundred fifteen".