51198599040 has 256 divisors, whose sum is σ = 168001344000. Its totient is φ = 13252681728.

The previous prime is 51198599027. The next prime is 51198599063. The reversal of 51198599040 is 4099589115.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59602131 + ... + 59602989.

It is an arithmetic number, because the mean of its divisors is an integer number (656255250).

Almost surely, 2^51198599040 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 51198599040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84000672000).

51198599040 is an abundant number, since it is smaller than the sum of its proper divisors (116802744960).

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

51198599040 is a wasteful number, since it uses less digits than its factorization.

51198599040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757 (or 1745 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 51.

The spelling of 51198599040 in words is "fifty-one billion, one hundred ninety-eight million, five hundred ninety-nine thousand, forty".