55401154315661 has 64 divisors (see below), whose sum is σ = 74717220593664. Its totient is φ = 39751717401600.

The previous prime is 55401154315609. The next prime is 55401154315693. The reversal of 55401154315661 is 16651345110455.

It is a cyclic number.

It is not a de Polignac number, because 55401154315661 - 2³⁸ = 55126276408717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55401154315361) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 174382046 + ... + 174699456.

It is an arithmetic number, because the mean of its divisors is an integer number (1167456571776).

Almost surely, 2^{55401154315661} is an apocalyptic number.

It is an amenable number.

55401154315661 is a deficient number, since it is larger than the sum of its proper divisors (19316066278003).

55401154315661 is a wasteful number, since it uses less digits than its factorization.

55401154315661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320330.

The product of its (nonzero) digits is 1080000, while the sum is 47.

The spelling of 55401154315661 in words is "fifty-five trillion, four hundred one billion, one hundred fifty-four million, three hundred fifteen thousand, six hundred sixty-one".