55642407154561 has 8 divisors (see below), whose sum is σ = 55710669825000. Its totient is φ = 55574145674880.

The previous prime is 55642407154519. The next prime is 55642407154567. The reversal of 55642407154561 is 16545170424655.

It can be written as a sum of positive squares in 4 ways, for example, as 7378041225025 + 48264365929536 = 2716255^2 + 6947256^2 .

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 55642407154561 - 2¹¹ = 55642407152513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55642407154567) 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, 126007525 + ... + 126448333.

It is an arithmetic number, because the mean of its divisors is an integer number (6963833728125).

Almost surely, 2^{55642407154561} is an apocalyptic number.

It is an amenable number.

55642407154561 is a deficient number, since it is larger than the sum of its proper divisors (68262670439).

55642407154561 is a wasteful number, since it uses less digits than its factorization.

55642407154561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595379.

The product of its (nonzero) digits is 20160000, while the sum is 55.

The spelling of 55642407154561 in words is "fifty-five trillion, six hundred forty-two billion, four hundred seven million, one hundred fifty-four thousand, five hundred sixty-one".