51040126500 has 192 divisors, whose sum is σ = 163120269312. Its totient is φ = 12298608000.

The previous prime is 51040126499. The next prime is 51040126513. The reversal of 51040126500 is 562104015.

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, 2746239 + ... + 2764761.

It is an arithmetic number, because the mean of its divisors is an integer number (849584736).

Almost surely, 2^51040126500 is an apocalyptic number.

51040126500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51040126500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81560134656).

51040126500 is an abundant number, since it is smaller than the sum of its proper divisors (112080142812).

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

51040126500 is a wasteful number, since it uses less digits than its factorization.

51040126500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18723 (or 18711 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The spelling of 51040126500 in words is "fifty-one billion, forty million, one hundred twenty-six thousand, five hundred".