51626372490 has 256 divisors, whose sum is σ = 173001277440. Its totient is φ = 10642544640.

The previous prime is 51626372467. The next prime is 51626372533. The reversal of 51626372490 is 9427362615.

51626372490 is a `hidden beast` number, since 5 + 1 + 6 + 2 + 637 + 2 + 4 + 9 + 0 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2630554 + ... + 2650106.

It is an arithmetic number, because the mean of its divisors is an integer number (675786240).

Almost surely, 2^51626372490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51626372490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86500638720).

51626372490 is an abundant number, since it is smaller than the sum of its proper divisors (121374904950).

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

51626372490 is a wasteful number, since it uses less digits than its factorization.

51626372490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19714 (or 19708 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 51626372490 in words is "fifty-one billion, six hundred twenty-six million, three hundred seventy-two thousand, four hundred ninety".