55781130016 has 24 divisors (see below), whose sum is σ = 110906423964. Its totient is φ = 27614419200.

The previous prime is 55781129951. The next prime is 55781130061. The reversal of 55781130016 is 61003118755.

It can be written as a sum of positive squares in 2 ways, for example, as 55317158416 + 463971600 = 235196^2 + 21540^2 .

It is a super-2 number, since 2×55781130016² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8626275 + ... + 8632738.

Almost surely, 2^55781130016 is an apocalyptic number.

It is an amenable number.

55781130016 is a deficient number, since it is larger than the sum of its proper divisors (55125293948).

55781130016 is a wasteful number, since it uses less digits than its factorization.

55781130016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17259124 (or 17259116 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 37.

The spelling of 55781130016 in words is "fifty-five billion, seven hundred eighty-one million, one hundred thirty thousand, sixteen".