53990767531 has 4 divisors (see below), whose sum is σ = 55009461312. Its totient is φ = 52972073752.

The previous prime is 53990767499. The next prime is 53990767541. The reversal of 53990767531 is 13576709935.

It is a happy number.

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 53990767531 - 2⁵ = 53990767499 is a prime.

It is a super-2 number, since 2×53990767531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53990767541) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 509346811 + ... + 509346916.

It is an arithmetic number, because the mean of its divisors is an integer number (13752365328).

Almost surely, 2^53990767531 is an apocalyptic number.

53990767531 is a deficient number, since it is larger than the sum of its proper divisors (1018693781).

53990767531 is a wasteful number, since it uses less digits than its factorization.

53990767531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018693780.

The product of its (nonzero) digits is 5358150, while the sum is 55.

The spelling of 53990767531 in words is "fifty-three billion, nine hundred ninety million, seven hundred sixty-seven thousand, five hundred thirty-one".