54615221615 has 16 divisors (see below), whose sum is σ = 69399125568. Its totient is φ = 41118690816.

The previous prime is 54615221603. The next prime is 54615221623. The reversal of 54615221615 is 51612251645.

It is a cyclic number.

It is not a de Polignac number, because 54615221615 - 2⁴ = 54615221599 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1637849 + ... + 1670861.

It is an arithmetic number, because the mean of its divisors is an integer number (4337445348).

Almost surely, 2^54615221615 is an apocalyptic number.

54615221615 is a deficient number, since it is larger than the sum of its proper divisors (14783903953).

54615221615 is a wasteful number, since it uses less digits than its factorization.

54615221615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52498.

The product of its digits is 72000, while the sum is 38.

The spelling of 54615221615 in words is "fifty-four billion, six hundred fifteen million, two hundred twenty-one thousand, six hundred fifteen".