51373584990 has 1008 divisors, whose sum is σ = 187160178528. Its totient is φ = 10087773696.

The previous prime is 51373584931. The next prime is 51373584991. The reversal of 51373584990 is 9948537315.

51373584990 is a `hidden beast` number, since 51 + 3 + 7 + 3 + 584 + 9 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51373584991) by changing a digit.

It is a polite number, since it can be written in 503 ways as a sum of consecutive naturals, for example, 1388475252 + ... + 1388475288.

Almost surely, 2^51373584990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51373584990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93580089264).

51373584990 is an abundant number, since it is smaller than the sum of its proper divisors (135786593538).

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

51373584990 is a wasteful number, since it uses less digits than its factorization.

51373584990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 54.

The spelling of 51373584990 in words is "fifty-one billion, three hundred seventy-three million, five hundred eighty-four thousand, nine hundred ninety".