55555505001 has 24 divisors (see below), whose sum is σ = 83140200000. Its totient is φ = 35705490912.

The previous prime is 55555504969. The next prime is 55555505009. The reversal of 55555505001 is 10050555555.

It is a happy number.

55555505001 is a `hidden beast` number, since 5 + 5 + 55 + 550 + 50 + 0 + 1 = 666.

It is not a de Polignac number, because 55555505001 - 2⁵ = 55555504969 is a prime.

It is a super-2 number, since 2×55555505001² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55555505009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10500 + ... + 333498.

It is an arithmetic number, because the mean of its divisors is an integer number (3464175000).

Almost surely, 2^55555505001 is an apocalyptic number.

It is an amenable number.

55555505001 is a deficient number, since it is larger than the sum of its proper divisors (27584694999).

55555505001 is a wasteful number, since it uses less digits than its factorization.

55555505001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323693 (or 323690 counting only the distinct ones).

The product of its (nonzero) digits is 78125, while the sum is 36.

The spelling of 55555505001 in words is "fifty-five billion, five hundred fifty-five million, five hundred five thousand, one".