91026510436 has 27 divisors (see below), whose sum is σ = 162016133643. Its totient is φ = 44749033920.

The previous prime is 91026510433. The next prime is 91026510439. The reversal of 91026510436 is 63401562019.

The square root of 91026510436 is 301706.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (91026510433) and next prime (91026510439).

It can be written as a sum of positive squares in 4 ways, for example, as 10565784100 + 80460726336 = 102790^2 + 283656^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91026510395 and 91026510404.

It is not an unprimeable number, because it can be changed into a prime (91026510433) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 36806896 + ... + 36809368.

Almost surely, 2^91026510436 is an apocalyptic number.

91026510436 is the 301706-th square number.

It is an amenable number.

91026510436 is a deficient number, since it is larger than the sum of its proper divisors (70989623207).

91026510436 is an frugal number, since it uses more digits than its factorization.

91026510436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5072 (or 2536 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 91026510436 in words is "ninety-one billion, twenty-six million, five hundred ten thousand, four hundred thirty-six".