52154618807997 has 18 divisors (see below), whose sum is σ = 79508103100062. Its totient is φ = 32939759245104.

The previous prime is 52154618807989. The next prime is 52154618808007. The reversal of 52154618807997 is 79970881645125.

It is a happy number.

52154618807997 is a `hidden beast` number, since 5 + 2 + 1 + 5 + 461 + 8 + 8 + 0 + 79 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 44083371899961 + 8071246908036 = 6639531^2 + 2840994^2 .

It is not a de Polignac number, because 52154618807997 - 2³ = 52154618807989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52154618807927) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8026253878 + ... + 8026260375.

Almost surely, 2^{52154618807997} is an apocalyptic number.

52154618807997 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

52154618807997 is a deficient number, since it is larger than the sum of its proper divisors (27353484292065).

52154618807997 is a wasteful number, since it uses less digits than its factorization.

52154618807997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16052514297 (or 16052514275 counting only the distinct ones).

The product of its (nonzero) digits is 304819200, while the sum is 72.

The spelling of 52154618807997 in words is "fifty-two trillion, one hundred fifty-four billion, six hundred eighteen million, eight hundred seven thousand, nine hundred ninety-seven".