55621630601 has 4 divisors (see below), whose sum is σ = 56131920900. Its totient is φ = 55111340304.

The previous prime is 55621630583. The next prime is 55621630703. The reversal of 55621630601 is 10603612655.

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 21211009600 + 34410621001 = 145640^2 + 185501^2 .

It is a cyclic number.

It is not a de Polignac number, because 55621630601 - 2³⁰ = 54547888777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55621680601) 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, 255144986 + ... + 255145203.

It is an arithmetic number, because the mean of its divisors is an integer number (14032980225).

Almost surely, 2^55621630601 is an apocalyptic number.

It is an amenable number.

55621630601 is a deficient number, since it is larger than the sum of its proper divisors (510290299).

55621630601 is a wasteful number, since it uses less digits than its factorization.

55621630601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510290298.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 55621630601 in words is "fifty-five billion, six hundred twenty-one million, six hundred thirty thousand, six hundred one".