55152661212 has 336 divisors, whose sum is σ = 162441135360. Its totient is φ = 16236288000.

The previous prime is 55152661199. The next prime is 55152661229. The reversal of 55152661212 is 21216625155.

55152661212 is a `hidden beast` number, since 5 + 5 + 1 + 5 + 26 + 612 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 285764988 + ... + 285765180.

It is an arithmetic number, because the mean of its divisors is an integer number (483455760).

Almost surely, 2^55152661212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55152661212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81220567680).

55152661212 is an abundant number, since it is smaller than the sum of its proper divisors (107288474148).

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

55152661212 is a wasteful number, since it uses less digits than its factorization.

55152661212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436 (or 419 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

The spelling of 55152661212 in words is "fifty-five billion, one hundred fifty-two million, six hundred sixty-one thousand, two hundred twelve".