55532977500 has 720 divisors, whose sum is σ = 218980903680. Its totient is φ = 10632960000.

The previous prime is 55532977483. The next prime is 55532977517. The reversal of 55532977500 is 577923555.

It is an interprime number because it is at equal distance from previous prime (55532977483) and next prime (55532977517).

It is a self number, because there is not a number n which added to its sum of digits gives 55532977500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 97597216 + ... + 97597784.

It is an arithmetic number, because the mean of its divisors is an integer number (304140144).

Almost surely, 2^55532977500 is an apocalyptic number.

55532977500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55532977500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109490451840).

55532977500 is an abundant number, since it is smaller than the sum of its proper divisors (163447926180).

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

55532977500 is a wasteful number, since it uses less digits than its factorization.

55532977500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640 (or 610 counting only the distinct ones).

The product of its (nonzero) digits is 1653750, while the sum is 48.

The spelling of 55532977500 in words is "fifty-five billion, five hundred thirty-two million, nine hundred seventy-seven thousand, five hundred".