761718998531 has 2 divisors, whose sum is σ = 761718998532. Its totient is φ = 761718998530.

The previous prime is 761718998389. The next prime is 761718998543. The reversal of 761718998531 is 135899817167.

761718998531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-761718998531 is a prime.

It is a super-2 number, since 2×761718998531² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (761718998591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 380859499265 + 380859499266.

It is an arithmetic number, because the mean of its divisors is an integer number (380859499266).

Almost surely, 2^761718998531 is an apocalyptic number.

761718998531 is a deficient number, since it is larger than the sum of its proper divisors (1).

761718998531 is an equidigital number, since it uses as much as digits as its factorization.

761718998531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22861440, while the sum is 65.

The spelling of 761718998531 in words is "seven hundred sixty-one billion, seven hundred eighteen million, nine hundred ninety-eight thousand, five hundred thirty-one".