11556277631 has 2 divisors, whose sum is σ = 11556277632. Its totient is φ = 11556277630.

The previous prime is 11556277547. The next prime is 11556277643. The reversal of 11556277631 is 13677265511.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11556277631 - 2¹⁴ = 11556261247 is a prime.

It is a super-2 number, since 2×11556277631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11556277231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5778138815 + 5778138816.

It is an arithmetic number, because the mean of its divisors is an integer number (5778138816).

Almost surely, 2^11556277631 is an apocalyptic number.

11556277631 is a deficient number, since it is larger than the sum of its proper divisors (1).

11556277631 is an equidigital number, since it uses as much as digits as its factorization.

11556277631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264600, while the sum is 44.

The spelling of 11556277631 in words is "eleven billion, five hundred fifty-six million, two hundred seventy-seven thousand, six hundred thirty-one".