55615559986 has 16 divisors (see below), whose sum is σ = 95380366464. Its totient is φ = 23825388384.

The previous prime is 55615559981. The next prime is 55615560001. The reversal of 55615559986 is 68995551655.

55615559986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (55615559981) 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, 785835 + ... + 853678.

It is an arithmetic number, because the mean of its divisors is an integer number (5961272904).

Almost surely, 2^55615559986 is an apocalyptic number.

55615559986 is a deficient number, since it is larger than the sum of its proper divisors (39764806478).

55615559986 is a wasteful number, since it uses less digits than its factorization.

55615559986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641945.

The product of its digits is 72900000, while the sum is 64.

The spelling of 55615559986 in words is "fifty-five billion, six hundred fifteen million, five hundred fifty-nine thousand, nine hundred eighty-six".