55531655715999 has 16 divisors (see below), whose sum is σ = 75306554403840. Its totient is φ = 36389086988160.

The previous prime is 55531655715869. The next prime is 55531655716007. The reversal of 55531655715999 is 99951755613555.

It is not a de Polignac number, because 55531655715999 - 2⁴³ = 46735562693791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55531655715999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55531655715499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18148047 + ... + 20986064.

It is an arithmetic number, because the mean of its divisors is an integer number (4706659650240).

Almost surely, 2^{55531655715999} is an apocalyptic number.

55531655715999 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

55531655715999 is a deficient number, since it is larger than the sum of its proper divisors (19774898687841).

55531655715999 is a wasteful number, since it uses less digits than its factorization.

55531655715999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39142190.

The product of its digits is 1435218750, while the sum is 75.

The spelling of 55531655715999 in words is "fifty-five trillion, five hundred thirty-one billion, six hundred fifty-five million, seven hundred fifteen thousand, nine hundred ninety-nine".