55953656881 has 2 divisors, whose sum is σ = 55953656882. Its totient is φ = 55953656880.

The previous prime is 55953656873. The next prime is 55953656897. The reversal of 55953656881 is 18865635955.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34655173281 + 21298483600 = 186159^2 + 145940^2 .

It is a cyclic number.

It is not a de Polignac number, because 55953656881 - 2³ = 55953656873 is a prime.

It is a super-2 number, since 2×55953656881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55953656851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27976828440 + 27976828441.

It is an arithmetic number, because the mean of its divisors is an integer number (27976828441).

Almost surely, 2^55953656881 is an apocalyptic number.

It is an amenable number.

55953656881 is a deficient number, since it is larger than the sum of its proper divisors (1).

55953656881 is an equidigital number, since it uses as much as digits as its factorization.

55953656881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880000, while the sum is 61.

The spelling of 55953656881 in words is "fifty-five billion, nine hundred fifty-three million, six hundred fifty-six thousand, eight hundred eighty-one".