55445513515 has 32 divisors (see below), whose sum is σ = 80571970944. Its totient is φ = 35756881920.

The previous prime is 55445513507. The next prime is 55445513533. The reversal of 55445513515 is 51531554455.

It is a happy number.

It is not a de Polignac number, because 55445513515 - 2³ = 55445513507 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 787957 + ... + 855433.

It is an arithmetic number, because the mean of its divisors is an integer number (2517874092).

Almost surely, 2^55445513515 is an apocalyptic number.

55445513515 is a deficient number, since it is larger than the sum of its proper divisors (25126457429).

55445513515 is a wasteful number, since it uses less digits than its factorization.

55445513515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68887.

The product of its digits is 750000, while the sum is 43.

The spelling of 55445513515 in words is "fifty-five billion, four hundred forty-five million, five hundred thirteen thousand, five hundred fifteen".