11431025531491 has 16 divisors (see below), whose sum is σ = 11738981116800. Its totient is φ = 11126976588288.

The previous prime is 11431025531489. The next prime is 11431025531501. The reversal of 11431025531491 is 19413552013411.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11431025531491 - 2¹ = 11431025531489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11431025531441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12910900 + ... + 13767838.

It is an arithmetic number, because the mean of its divisors is an integer number (733686319800).

Almost surely, 2^{11431025531491} is an apocalyptic number.

11431025531491 is a deficient number, since it is larger than the sum of its proper divisors (307955585309).

11431025531491 is a wasteful number, since it uses less digits than its factorization.

11431025531491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859218.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 11431025531491 in words is "eleven trillion, four hundred thirty-one billion, twenty-five million, five hundred thirty-one thousand, four hundred ninety-one".