78472763122631 has 2 divisors, whose sum is σ = 78472763122632. Its totient is φ = 78472763122630.

The previous prime is 78472763122597. The next prime is 78472763122703. The reversal of 78472763122631 is 13622136727487.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78472763122631 - 2²² = 78472758928327 is a prime.

It is a super-2 number, since 2×78472763122631² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78472763122031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39236381561315 + 39236381561316.

It is an arithmetic number, because the mean of its divisors is an integer number (39236381561316).

Almost surely, 2^{78472763122631} is an apocalyptic number.

78472763122631 is a deficient number, since it is larger than the sum of its proper divisors (1).

78472763122631 is an equidigital number, since it uses as much as digits as its factorization.

78472763122631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28449792, while the sum is 59.

The spelling of 78472763122631 in words is "seventy-eight trillion, four hundred seventy-two billion, seven hundred sixty-three million, one hundred twenty-two thousand, six hundred thirty-one".