55993907381 has 8 divisors (see below), whose sum is σ = 56350368000. Its totient is φ = 55638198000.

The previous prime is 55993907377. The next prime is 55993907447. The reversal of 55993907381 is 18370939955.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55993907381 - 2² = 55993907377 is a prime.

It is a super-2 number, since 2×55993907381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55993907381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55993907311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37886 + ... + 336783.

It is an arithmetic number, because the mean of its divisors is an integer number (7043796000).

Almost surely, 2^55993907381 is an apocalyptic number.

It is an amenable number.

55993907381 is a deficient number, since it is larger than the sum of its proper divisors (356460619).

55993907381 is a wasteful number, since it uses less digits than its factorization.

55993907381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375619.

The product of its (nonzero) digits is 9185400, while the sum is 59.

The spelling of 55993907381 in words is "fifty-five billion, nine hundred ninety-three million, nine hundred seven thousand, three hundred eighty-one".