51409191000 has 128 divisors (see below), whose sum is σ = 165571061760. Its totient is φ = 13266864000.

The previous prime is 51409190993. The next prime is 51409191007. The reversal of 51409191000 is 19190415.

It is an interprime number because it is at equal distance from previous prime (51409190993) and next prime (51409191007).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51409191007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183394 + ... + 369393.

It is an arithmetic number, because the mean of its divisors is an integer number (1293523920).

Almost surely, 2^51409191000 is an apocalyptic number.

51409191000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51409191000 is an abundant number, since it is smaller than the sum of its proper divisors (114161870760).

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

51409191000 is a wasteful number, since it uses less digits than its factorization.

51409191000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552842 (or 552828 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 30.

The spelling of 51409191000 in words is "fifty-one billion, four hundred nine million, one hundred ninety-one thousand".