91026765049 has 32 divisors (see below), whose sum is σ = 107698377600. Its totient is φ = 76052021760.

The previous prime is 91026765031. The next prime is 91026765073. The reversal of 91026765049 is 94056762019.

It is a happy number.

It is not a de Polignac number, because 91026765049 - 2⁵ = 91026765017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91026764993 and 91026765011.

It is not an unprimeable number, because it can be changed into a prime (91026763049) 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, 939687 + ... + 1032019.

It is an arithmetic number, because the mean of its divisors is an integer number (3365574300).

Almost surely, 2^91026765049 is an apocalyptic number.

It is an amenable number.

91026765049 is a deficient number, since it is larger than the sum of its proper divisors (16671612551).

91026765049 is a wasteful number, since it uses less digits than its factorization.

91026765049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92505.

The product of its (nonzero) digits is 816480, while the sum is 49.

The spelling of 91026765049 in words is "ninety-one billion, twenty-six million, seven hundred sixty-five thousand, forty-nine".