55198406015 has 4 divisors (see below), whose sum is σ = 66238087224. Its totient is φ = 44158724808.

The previous prime is 55198405981. The next prime is 55198406041. The reversal of 55198406015 is 51060489155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55198406015 - 2²² = 55194211711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5519840597 + ... + 5519840606.

It is an arithmetic number, because the mean of its divisors is an integer number (16559521806).

Almost surely, 2^55198406015 is an apocalyptic number.

55198406015 is a deficient number, since it is larger than the sum of its proper divisors (11039681209).

55198406015 is a wasteful number, since it uses less digits than its factorization.

55198406015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11039681208.

The product of its (nonzero) digits is 216000, while the sum is 44.

The spelling of 55198406015 in words is "fifty-five billion, one hundred ninety-eight million, four hundred six thousand, fifteen".