55415131557 has 8 divisors (see below), whose sum is σ = 78233126976. Its totient is φ = 34770278592.

The previous prime is 55415131463. The next prime is 55415131561. The reversal of 55415131557 is 75513151455.

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

It is not a de Polignac number, because 55415131557 - 2¹² = 55415127461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55415131567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 543285553 + ... + 543285654.

It is an arithmetic number, because the mean of its divisors is an integer number (9779140872).

Almost surely, 2^55415131557 is an apocalyptic number.

It is an amenable number.

55415131557 is a deficient number, since it is larger than the sum of its proper divisors (22817995419).

55415131557 is a wasteful number, since it uses less digits than its factorization.

55415131557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086571227.

The product of its digits is 262500, while the sum is 42.

The spelling of 55415131557 in words is "fifty-five billion, four hundred fifteen million, one hundred thirty-one thousand, five hundred fifty-seven".