718541137128431 has 2 divisors, whose sum is σ = 718541137128432. Its totient is φ = 718541137128430.

The previous prime is 718541137128421. The next prime is 718541137128443. The reversal of 718541137128431 is 134821731145817.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 718541137128431 - 2¹⁴ = 718541137112047 is a prime.

It is a super-2 number, since 2×718541137128431² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (718541137128421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359270568564215 + 359270568564216.

It is an arithmetic number, because the mean of its divisors is an integer number (359270568564216).

Almost surely, 2^{718541137128431} is an apocalyptic number.

718541137128431 is a deficient number, since it is larger than the sum of its proper divisors (1).

718541137128431 is an equidigital number, since it uses as much as digits as its factorization.

718541137128431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4515840, while the sum is 56.

The spelling of 718541137128431 in words is "seven hundred eighteen trillion, five hundred forty-one billion, one hundred thirty-seven million, one hundred twenty-eight thousand, four hundred thirty-one".