551545545155 has 32 divisors (see below), whose sum is σ = 739315399680. Its totient is φ = 391529940480.

The previous prime is 551545545143. The next prime is 551545545169.

551545545155 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 551545545155 - 2⁶ = 551545545091 is a prime.

It is a super-2 number, since 2×551545545155² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3443174 + ... + 3599796.

It is an arithmetic number, because the mean of its divisors is an integer number (23103606240).

Almost surely, 2^551545545155 is an apocalyptic number.

551545545155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

551545545155 is a deficient number, since it is larger than the sum of its proper divisors (187769854525).

551545545155 is a wasteful number, since it uses less digits than its factorization.

551545545155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158171.

The product of its digits is 6250000, while the sum is 50.

The spelling of 551545545155 in words is "five hundred fifty-one billion, five hundred forty-five million, five hundred forty-five thousand, one hundred fifty-five".