2591257996098 has 30 divisors (see below), whose sum is σ = 5806383271689. Its totient is φ = 863745835824.

The previous prime is 2591257996097. The next prime is 2591257996121. The reversal of 2591257996098 is 8906997521952.

2591257996098 is a `hidden beast` number, since 2 + 5 + 9 + 1 + 2 + 5 + 7 + 9 + 9 + 609 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2141723952369 + 449534043729 = 1463463^2 + 670473^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1138257.

It is not an unprimeable number, because it can be changed into a prime (2591257996097) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 20425390 + ... + 20551862.

Almost surely, 2^{2591257996098} is an apocalyptic number.

2591257996098 is an abundant number, since it is smaller than the sum of its proper divisors (3215125275591).

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

2591257996098 is an frugal number, since it uses more digits than its factorization.

2591257996098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252960 (or 126478 counting only the distinct ones).

The product of its (nonzero) digits is 220449600, while the sum is 72.

Multiplying 2591257996098 by its sum of digits (72), we get a square (186570575719056 = 13659084²).

The spelling of 2591257996098 in words is "two trillion, five hundred ninety-one billion, two hundred fifty-seven million, nine hundred ninety-six thousand, ninety-eight".