55981980036 has 60 divisors (see below), whose sum is σ = 152710928832. Its totient is φ = 17849324592.

The previous prime is 55981980031. The next prime is 55981980071. The reversal of 55981980036 is 63008918955.

It is a happy number.

55981980036 is a `hidden beast` number, since 5 + 598 + 19 + 8 + 0 + 0 + 36 = 666.

It is a super-2 number, since 2×55981980036² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (55981980031) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3748720 + ... + 3763623.

Almost surely, 2^55981980036 is an apocalyptic number.

It is an amenable number.

55981980036 is an abundant number, since it is smaller than the sum of its proper divisors (96728948796).

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

55981980036 is a wasteful number, since it uses less digits than its factorization.

55981980036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7512382 (or 7512371 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 54.

The spelling of 55981980036 in words is "fifty-five billion, nine hundred eighty-one million, nine hundred eighty thousand, thirty-six".