55115101511557 has 8 divisors (see below), whose sum is σ = 55196275358840. Its totient is φ = 55033980880320.

The previous prime is 55115101511551. The next prime is 55115101511567. The reversal of 55115101511557 is 75511510151155.

It can be written as a sum of positive squares in 4 ways, for example, as 46897281689281 + 8217819822276 = 6848159^2 + 2866674^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55115101511557 - 2²³ = 55115093122949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55115101511551) 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 7 ways as a sum of consecutive naturals, for example, 11230878 + ... + 15374095.

It is an arithmetic number, because the mean of its divisors is an integer number (6899534419855).

Almost surely, 2^{55115101511557} is an apocalyptic number.

It is an amenable number.

55115101511557 is a deficient number, since it is larger than the sum of its proper divisors (81173847283).

55115101511557 is a wasteful number, since it uses less digits than its factorization.

55115101511557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26608023.

The product of its (nonzero) digits is 109375, while the sum is 43.

The spelling of 55115101511557 in words is "fifty-five trillion, one hundred fifteen billion, one hundred one million, five hundred eleven thousand, five hundred fifty-seven".