55615907427 has 16 divisors (see below), whose sum is σ = 76103694240. Its totient is φ = 36106041600.

The previous prime is 55615907411. The next prime is 55615907429. The reversal of 55615907427 is 72470951655.

It is not a de Polignac number, because 55615907427 - 2⁴ = 55615907411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55615907427.

It is not an unprimeable number, because it can be changed into a prime (55615907429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351352 + ... + 484437.

It is an arithmetic number, because the mean of its divisors is an integer number (4756480890).

Almost surely, 2^55615907427 is an apocalyptic number.

55615907427 is a deficient number, since it is larger than the sum of its proper divisors (20487786813).

55615907427 is a wasteful number, since it uses less digits than its factorization.

55615907427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836374.

The product of its (nonzero) digits is 2646000, while the sum is 51.

The spelling of 55615907427 in words is "fifty-five billion, six hundred fifteen million, nine hundred seven thousand, four hundred twenty-seven".