53971983515 has 16 divisors (see below), whose sum is σ = 65838077760. Its totient is φ = 42463336320.

The previous prime is 53971983493. The next prime is 53971983523. The reversal of 53971983515 is 51538917935.

It is not a de Polignac number, because 53971983515 - 2¹⁸ = 53971721371 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3640097 + ... + 3654893.

It is an arithmetic number, because the mean of its divisors is an integer number (4114879860).

Almost surely, 2^53971983515 is an apocalyptic number.

53971983515 is a deficient number, since it is larger than the sum of its proper divisors (11866094245).

53971983515 is a wasteful number, since it uses less digits than its factorization.

53971983515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26822.

The product of its digits is 5103000, while the sum is 56.

The spelling of 53971983515 in words is "fifty-three billion, nine hundred seventy-one million, nine hundred eighty-three thousand, five hundred fifteen".