78721402411 has 2 divisors, whose sum is σ = 78721402412. Its totient is φ = 78721402410.

The previous prime is 78721402369. The next prime is 78721402423. The reversal of 78721402411 is 11420412787.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78721402411 - 2⁷ = 78721402283 is a prime.

It is a super-2 number, since 2×78721402411² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78721406411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39360701205 + 39360701206.

It is an arithmetic number, because the mean of its divisors is an integer number (39360701206).

Almost surely, 2^78721402411 is an apocalyptic number.

78721402411 is a deficient number, since it is larger than the sum of its proper divisors (1).

78721402411 is an equidigital number, since it uses as much as digits as its factorization.

78721402411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 37.

The spelling of 78721402411 in words is "seventy-eight billion, seven hundred twenty-one million, four hundred two thousand, four hundred eleven".