55146221612625 has 144 divisors (see below), whose sum is σ = 109219403389824. Its totient is φ = 24680823024000.

The previous prime is 55146221612611. The next prime is 55146221612689. The reversal of 55146221612625 is 52621612264155.

It is not a de Polignac number, because 55146221612625 - 2⁸ = 55146221612369 is a prime.

It is a super-2 number, since 2×55146221612625² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4072684 + ... + 11264066.

It is an arithmetic number, because the mean of its divisors is an integer number (758468079096).

Almost surely, 2^{55146221612625} is an apocalyptic number.

55146221612625 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55146221612625 is a deficient number, since it is larger than the sum of its proper divisors (54073181777199).

55146221612625 is a wasteful number, since it uses less digits than its factorization.

55146221612625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7191449 (or 7191415 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 48.

The spelling of 55146221612625 in words is "fifty-five trillion, one hundred forty-six billion, two hundred twenty-one million, six hundred twelve thousand, six hundred twenty-five".