51698188950 has 96 divisors (see below), whose sum is σ = 131795921664. Its totient is φ = 13401440640.

The previous prime is 51698188943. The next prime is 51698188967. The reversal of 51698188950 is 5988189615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7250287 + ... + 7257413.

It is an arithmetic number, because the mean of its divisors is an integer number (1372874184).

Almost surely, 2^51698188950 is an apocalyptic number.

51698188950 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51698188950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65897960832).

51698188950 is an abundant number, since it is smaller than the sum of its proper divisors (80097732714).

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

51698188950 is a wasteful number, since it uses less digits than its factorization.

51698188950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8486 (or 8481 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 60.

The spelling of 51698188950 in words is "fifty-one billion, six hundred ninety-eight million, one hundred eighty-eight thousand, nine hundred fifty".