51671890704 has 160 divisors (see below), whose sum is σ = 157705461760. Its totient is φ = 14266368000.

The previous prime is 51671890691. The next prime is 51671890717. The reversal of 51671890704 is 40709817615.

It is an interprime number because it is at equal distance from previous prime (51671890691) and next prime (51671890717).

It is a super-2 number, since 2×51671890704² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 8006679 + ... + 8013129.

It is an arithmetic number, because the mean of its divisors is an integer number (985659136).

Almost surely, 2^51671890704 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 51671890704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78852730880).

51671890704 is an abundant number, since it is smaller than the sum of its proper divisors (106033571056).

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

51671890704 is a wasteful number, since it uses less digits than its factorization.

51671890704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7269 (or 7263 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 48.

The spelling of 51671890704 in words is "fifty-one billion, six hundred seventy-one million, eight hundred ninety thousand, seven hundred four".