55639980032 has 384 divisors, whose sum is σ = 143844180480. Its totient is φ = 20932853760.

The previous prime is 55639980001. The next prime is 55639980037. The reversal of 55639980032 is 23008993655.

It is a super-2 number, since 2×55639980032² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55639980037) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 424732607 + ... + 424732737.

It is an arithmetic number, because the mean of its divisors is an integer number (374594220).

Almost surely, 2^55639980032 is an apocalyptic number.

55639980032 is a gapful number since it is divisible by the number (52) 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 55639980032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71922090240).

55639980032 is an abundant number, since it is smaller than the sum of its proper divisors (88204200448).

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

55639980032 is a wasteful number, since it uses less digits than its factorization.

55639980032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 50.

The spelling of 55639980032 in words is "fifty-five billion, six hundred thirty-nine million, nine hundred eighty thousand, thirty-two".