55726731900 has 216 divisors, whose sum is σ = 201152375424. Its totient is φ = 12640118400.

The previous prime is 55726731899. The next prime is 55726731911. The reversal of 55726731900 is 913762755.

55726731900 is a `hidden beast` number, since 5 + 572 + 6 + 73 + 1 + 9 + 0 + 0 = 666.

It is a super-2 number, since 2×55726731900² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 791539 + ... + 859061.

Almost surely, 2^55726731900 is an apocalyptic number.

55726731900 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 55726731900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100576187712).

55726731900 is an abundant number, since it is smaller than the sum of its proper divisors (145425643524).

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

55726731900 is a wasteful number, since it uses less digits than its factorization.

55726731900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67681 (or 67671 counting only the distinct ones).

The product of its (nonzero) digits is 396900, while the sum is 45.

The spelling of 55726731900 in words is "fifty-five billion, seven hundred twenty-six million, seven hundred thirty-one thousand, nine hundred".