11551531252456 has 16 divisors (see below), whose sum is σ = 23325207336900. Its totient is φ = 5331475962624.

The previous prime is 11551531252381. The next prime is 11551531252489. The reversal of 11551531252456 is 65425213515511.

It can be written as a sum of positive squares in 2 ways, for example, as 10747578722500 + 803952529956 = 3278350^2 + 896634^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55536207841 + ... + 55536208048.

Almost surely, 2^{11551531252456} is an apocalyptic number.

It is an amenable number.

11551531252456 is an abundant number, since it is smaller than the sum of its proper divisors (11773676084444).

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

11551531252456 is a wasteful number, since it uses less digits than its factorization.

11551531252456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111072415908 (or 111072415904 counting only the distinct ones).

The product of its digits is 900000, while the sum is 46.

Adding to 11551531252456 its reverse (65425213515511), we get a palindrome (76976744767967).

The spelling of 11551531252456 in words is "eleven trillion, five hundred fifty-one billion, five hundred thirty-one million, two hundred fifty-two thousand, four hundred fifty-six".