54981551515 has 32 divisors (see below), whose sum is σ = 73628144640. Its totient is φ = 39071443200.

The previous prime is 54981551509. The next prime is 54981551531. The reversal of 54981551515 is 51515518945.

It is not a de Polignac number, because 54981551515 - 2²⁷ = 54847333787 is a prime.

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, 1582935 + ... + 1617295.

It is an arithmetic number, because the mean of its divisors is an integer number (2300879520).

Almost surely, 2^54981551515 is an apocalyptic number.

54981551515 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

54981551515 is a deficient number, since it is larger than the sum of its proper divisors (18646593125).

54981551515 is a wasteful number, since it uses less digits than its factorization.

54981551515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35043.

The product of its digits is 900000, while the sum is 49.

The spelling of 54981551515 in words is "fifty-four billion, nine hundred eighty-one million, five hundred fifty-one thousand, five hundred fifteen".