775982798831 has 2 divisors, whose sum is σ = 775982798832. Its totient is φ = 775982798830.

The previous prime is 775982798791. The next prime is 775982798837. The reversal of 775982798831 is 138897289577.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-775982798831 is a prime.

It is a super-2 number, since 2×775982798831² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (775982798837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387991399415 + 387991399416.

It is an arithmetic number, because the mean of its divisors is an integer number (387991399416).

Almost surely, 2^775982798831 is an apocalyptic number.

775982798831 is a deficient number, since it is larger than the sum of its proper divisors (1).

775982798831 is an equidigital number, since it uses as much as digits as its factorization.

775982798831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 426746880, while the sum is 74.

The spelling of 775982798831 in words is "seven hundred seventy-five billion, nine hundred eighty-two million, seven hundred ninety-eight thousand, eight hundred thirty-one".