55782765126 has 128 divisors (see below), whose sum is σ = 136648512000. Its totient is φ = 16727575680.

The previous prime is 55782765079. The next prime is 55782765151. The reversal of 55782765126 is 62156728755.

55782765126 is a `hidden beast` number, since 5 + 57 + 8 + 2 + 76 + 512 + 6 = 666.

It is a super-2 number, since 2×55782765126² (a number of 22 digits) contains 22 as substring.

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 63 ways as a sum of consecutive naturals, for example, 27170316 + ... + 27172368.

It is an arithmetic number, because the mean of its divisors is an integer number (1067566500).

Almost surely, 2^55782765126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55782765126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68324256000).

55782765126 is an abundant number, since it is smaller than the sum of its proper divisors (80865746874).

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

55782765126 is a wasteful number, since it uses less digits than its factorization.

55782765126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2531 (or 2525 counting only the distinct ones).

The product of its digits is 7056000, while the sum is 54.

The spelling of 55782765126 in words is "fifty-five billion, seven hundred eighty-two million, seven hundred sixty-five thousand, one hundred twenty-six".