78902562811 has 2 divisors, whose sum is σ = 78902562812. Its totient is φ = 78902562810.

The previous prime is 78902562787. The next prime is 78902562919. The reversal of 78902562811 is 11826520987.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78902562811 - 2⁵ = 78902562779 is a prime.

It is a super-2 number, since 2×78902562811² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78902565811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39451281405 + 39451281406.

It is an arithmetic number, because the mean of its divisors is an integer number (39451281406).

Almost surely, 2^78902562811 is an apocalyptic number.

78902562811 is a deficient number, since it is larger than the sum of its proper divisors (1).

78902562811 is an equidigital number, since it uses as much as digits as its factorization.

78902562811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 49.

The spelling of 78902562811 in words is "seventy-eight billion, nine hundred two million, five hundred sixty-two thousand, eight hundred eleven".