55125987804 has 24 divisors (see below), whose sum is σ = 142919227920. Its totient is φ = 18375329232.

The previous prime is 55125987793. The next prime is 55125987811. The reversal of 55125987804 is 40878952155.

55125987804 is a `hidden beast` number, since 5 + 512 + 59 + 8 + 78 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255212799 + ... + 255213014.

It is an arithmetic number, because the mean of its divisors is an integer number (5954967830).

Almost surely, 2^55125987804 is an apocalyptic number.

55125987804 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

55125987804 is an abundant number, since it is smaller than the sum of its proper divisors (87793240116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55125987804 is a wasteful number, since it uses less digits than its factorization.

55125987804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510425826 (or 510425818 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 54.

The spelling of 55125987804 in words is "fifty-five billion, one hundred twenty-five million, nine hundred eighty-seven thousand, eight hundred four".