51953467638 has 32 divisors (see below), whose sum is σ = 106731535104. Its totient is φ = 16847199072.

The previous prime is 51953467633. The next prime is 51953467639. The reversal of 51953467638 is 83676435915.

It is a super-2 number, since 2×51953467638² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51953467633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1901631 + ... + 1928757.

It is an arithmetic number, because the mean of its divisors is an integer number (3335360472).

Almost surely, 2^51953467638 is an apocalyptic number.

51953467638 is an abundant number, since it is smaller than the sum of its proper divisors (54778067466).

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

51953467638 is a wasteful number, since it uses less digits than its factorization.

51953467638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35796.

The product of its digits is 16329600, while the sum is 57.

The spelling of 51953467638 in words is "fifty-one billion, nine hundred fifty-three million, four hundred sixty-seven thousand, six hundred thirty-eight".