51662725470630 has 128 divisors (see below), whose sum is σ = 138709265909760. Its totient is φ = 13682846920320.

The previous prime is 51662725470583. The next prime is 51662725470659. The reversal of 51662725470630 is 3607452726615.

51662725470630 is a `hidden beast` number, since 5 + 1 + 6 + 62 + 7 + 2 + 547 + 0 + 6 + 30 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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, 22149127 + ... + 24370253.

It is an arithmetic number, because the mean of its divisors is an integer number (1083666139920).

Almost surely, 2^{51662725470630} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51662725470630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69354632954880).

51662725470630 is an abundant number, since it is smaller than the sum of its proper divisors (87046540439130).

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

51662725470630 is a wasteful number, since it uses less digits than its factorization.

51662725470630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221731 (or 2221725 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 54.

The spelling of 51662725470630 in words is "fifty-one trillion, six hundred sixty-two billion, seven hundred twenty-five million, four hundred seventy thousand, six hundred thirty".