91409325026 has 8 divisors (see below), whose sum is σ = 140819771100. Its totient is φ = 44469401328.

The previous prime is 91409325019. The next prime is 91409325041. The reversal of 91409325026 is 62052390419.

It can be written as a sum of positive squares in 2 ways, for example, as 90003000025 + 1406325001 = 300005^2 + 37501^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 617630501 + ... + 617630648.

Almost surely, 2^91409325026 is an apocalyptic number.

91409325026 is a deficient number, since it is larger than the sum of its proper divisors (49410446074).

91409325026 is a wasteful number, since it uses less digits than its factorization.

91409325026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235261188.

The product of its (nonzero) digits is 116640, while the sum is 41.

The spelling of 91409325026 in words is "ninety-one billion, four hundred nine million, three hundred twenty-five thousand, twenty-six".