1957742139007 has 2 divisors, whose sum is σ = 1957742139008. Its totient is φ = 1957742139006.

The previous prime is 1957742138941. The next prime is 1957742139019. The reversal of 1957742139007 is 7009312477591.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1957742139007 - 2²⁷ = 1957607921279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1957742139077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978871069503 + 978871069504.

It is an arithmetic number, because the mean of its divisors is an integer number (978871069504).

Almost surely, 2^{1957742139007} is an apocalyptic number.

1957742139007 is a deficient number, since it is larger than the sum of its proper divisors (1).

1957742139007 is an equidigital number, since it uses as much as digits as its factorization.

1957742139007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3333960, while the sum is 55.

The spelling of 1957742139007 in words is "one trillion, nine hundred fifty-seven billion, seven hundred forty-two million, one hundred thirty-nine thousand, seven".