55551655601 has 4 divisors (see below), whose sum is σ = 59824859892. Its totient is φ = 51278451312.

The previous prime is 55551655583. The next prime is 55551655697. The reversal of 55551655601 is 10655615555.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7141095025 + 48410560576 = 84505^2 + 220024^2 .

It is a cyclic number.

It is not a de Polignac number, because 55551655601 - 2¹⁴ = 55551639217 is a prime.

It is a super-2 number, since 2×55551655601² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55551651601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2136602126 + ... + 2136602151.

It is an arithmetic number, because the mean of its divisors is an integer number (14956214973).

Almost surely, 2^55551655601 is an apocalyptic number.

It is an amenable number.

55551655601 is a deficient number, since it is larger than the sum of its proper divisors (4273204291).

55551655601 is a wasteful number, since it uses less digits than its factorization.

55551655601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4273204290.

The product of its (nonzero) digits is 562500, while the sum is 44.

The spelling of 55551655601 in words is "fifty-five billion, five hundred fifty-one million, six hundred fifty-five thousand, six hundred one".