55550551001001 has 16 divisors (see below), whose sum is σ = 89103640704000. Its totient is φ = 30072478737168.

The previous prime is 55550551000979. The next prime is 55550551001003. The reversal of 55550551001001 is 10010015505555.

It is not a de Polignac number, because 55550551001001 - 2⁶ = 55550551000937 is a prime.

It is a super-4 number, since 4×55550551001001⁴ (a number of 56 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (55550551001003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69612218901 + ... + 69612219698.

It is an arithmetic number, because the mean of its divisors is an integer number (5568977544000).

Almost surely, 2^{55550551001001} is an apocalyptic number.

It is an amenable number.

55550551001001 is a deficient number, since it is larger than the sum of its proper divisors (33553089702999).

55550551001001 is a wasteful number, since it uses less digits than its factorization.

55550551001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139224438628.

The product of its (nonzero) digits is 15625, while the sum is 33.

Adding to 55550551001001 its reverse (10010015505555), we get a palindrome (65560566506556).

The spelling of 55550551001001 in words is "fifty-five trillion, five hundred fifty billion, five hundred fifty-one million, one thousand, one".