78926031511 has 2 divisors, whose sum is σ = 78926031512. Its totient is φ = 78926031510.

The previous prime is 78926031493. The next prime is 78926031607. The reversal of 78926031511 is 11513062987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78926031511 - 2⁷ = 78926031383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78926032511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39463015755 + 39463015756.

It is an arithmetic number, because the mean of its divisors is an integer number (39463015756).

Almost surely, 2^78926031511 is an apocalyptic number.

78926031511 is a deficient number, since it is larger than the sum of its proper divisors (1).

78926031511 is an equidigital number, since it uses as much as digits as its factorization.

78926031511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 78926031511 in words is "seventy-eight billion, nine hundred twenty-six million, thirty-one thousand, five hundred eleven".