51662073432 has 128 divisors (see below), whose sum is σ = 141887116800. Its totient is φ = 15602485248.

The previous prime is 51662073431. The next prime is 51662073439. The reversal of 51662073432 is 23437026615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51662073431) 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, 4099413 + ... + 4111995.

It is an arithmetic number, because the mean of its divisors is an integer number (1108493100).

Almost surely, 2^51662073432 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 51662073432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70943558400).

51662073432 is an abundant number, since it is smaller than the sum of its proper divisors (90225043368).

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

51662073432 is a wasteful number, since it uses less digits than its factorization.

51662073432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12985 (or 12981 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 39.

The spelling of 51662073432 in words is "fifty-one billion, six hundred sixty-two million, seventy-three thousand, four hundred thirty-two".