1540377774431 has 2 divisors, whose sum is σ = 1540377774432. Its totient is φ = 1540377774430.

The previous prime is 1540377774373. The next prime is 1540377774479. The reversal of 1540377774431 is 1344777730451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1540377774431 - 2³⁴ = 1523197905247 is a prime.

It is a super-2 number, since 2×1540377774431² (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 (1540377779431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770188887215 + 770188887216.

It is an arithmetic number, because the mean of its divisors is an integer number (770188887216).

Almost surely, 2^{1540377774431} is an apocalyptic number.

1540377774431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540377774431 is an equidigital number, since it uses as much as digits as its factorization.

1540377774431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6914880, while the sum is 53.

The spelling of 1540377774431 in words is "one trillion, five hundred forty billion, three hundred seventy-seven million, seven hundred seventy-four thousand, four hundred thirty-one".