78747063631 has 2 divisors, whose sum is σ = 78747063632. Its totient is φ = 78747063630.

The previous prime is 78747063611. The next prime is 78747063641. The reversal of 78747063631 is 13636074787.

It is a strong prime.

It is an emirp because it is prime and its reverse (13636074787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78747063631 - 2⁵ = 78747063599 is a prime.

It is a super-2 number, since 2×78747063631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78747063611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39373531815 + 39373531816.

It is an arithmetic number, because the mean of its divisors is an integer number (39373531816).

Almost surely, 2^78747063631 is an apocalyptic number.

78747063631 is a deficient number, since it is larger than the sum of its proper divisors (1).

78747063631 is an equidigital number, since it uses as much as digits as its factorization.

78747063631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3556224, while the sum is 52.

The spelling of 78747063631 in words is "seventy-eight billion, seven hundred forty-seven million, sixty-three thousand, six hundred thirty-one".