1392806918431 has 4 divisors (see below), whose sum is σ = 1392822375264. Its totient is φ = 1392791461600.

The previous prime is 1392806918413. The next prime is 1392806918441. The reversal of 1392806918431 is 1348196082931.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1392806918431 - 2⁷ = 1392806918303 is a prime.

It is a super-2 number, since 2×1392806918431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392806918401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7592455 + ... + 7773736.

It is an arithmetic number, because the mean of its divisors is an integer number (348205593816).

Almost surely, 2^{1392806918431} is an apocalyptic number.

1392806918431 is a deficient number, since it is larger than the sum of its proper divisors (15456833).

1392806918431 is an equidigital number, since it uses as much as digits as its factorization.

1392806918431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15456832.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The spelling of 1392806918431 in words is "one trillion, three hundred ninety-two billion, eight hundred six million, nine hundred eighteen thousand, four hundred thirty-one".