51489950646 has 16 divisors (see below), whose sum is σ = 103016285424. Its totient is φ = 17157252864.

The previous prime is 51489950641. The next prime is 51489950651. The reversal of 51489950646 is 64605998415.

It is an interprime number because it is at equal distance from previous prime (51489950641) and next prime (51489950651).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51489950641) 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, 1497591 + ... + 1531586.

It is an arithmetic number, because the mean of its divisors is an integer number (6438517839).

Almost surely, 2^51489950646 is an apocalyptic number.

51489950646 is an abundant number, since it is smaller than the sum of its proper divisors (51526334778).

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

51489950646 is a wasteful number, since it uses less digits than its factorization.

51489950646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3032015.

The product of its (nonzero) digits is 9331200, while the sum is 57.

The spelling of 51489950646 in words is "fifty-one billion, four hundred eighty-nine million, nine hundred fifty thousand, six hundred forty-six".