51945960989 has 8 divisors (see below), whose sum is σ = 58374056832. Its totient is φ = 45865329840.

The previous prime is 51945960973. The next prime is 51945961009. The reversal of 51945960989 is 98906954915.

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

It is a cyclic number.

It is not a de Polignac number, because 51945960989 - 2⁴ = 51945960973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51945960919) 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, 86865857 + ... + 86866454.

It is an arithmetic number, because the mean of its divisors is an integer number (7296757104).

Almost surely, 2^51945960989 is an apocalyptic number.

It is an amenable number.

51945960989 is a deficient number, since it is larger than the sum of its proper divisors (6428095843).

51945960989 is a wasteful number, since it uses less digits than its factorization.

51945960989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173732347.

The product of its (nonzero) digits is 31492800, while the sum is 65.

The spelling of 51945960989 in words is "fifty-one billion, nine hundred forty-five million, nine hundred sixty thousand, nine hundred eighty-nine".