51889719621 has 8 divisors (see below), whose sum is σ = 70134050560. Its totient is φ = 34119267552.

The previous prime is 51889719617. The next prime is 51889719653. The reversal of 51889719621 is 12691798815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51889719621 - 2² = 51889719617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51889719671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118469461 + ... + 118469898.

It is an arithmetic number, because the mean of its divisors is an integer number (8766756320).

Almost surely, 2^51889719621 is an apocalyptic number.

It is an amenable number.

51889719621 is a deficient number, since it is larger than the sum of its proper divisors (18244330939).

51889719621 is a wasteful number, since it uses less digits than its factorization.

51889719621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236939435.

The product of its digits is 2177280, while the sum is 57.

The spelling of 51889719621 in words is "fifty-one billion, eight hundred eighty-nine million, seven hundred nineteen thousand, six hundred twenty-one".