1957391257723 has 16 divisors (see below), whose sum is σ = 2268308617344. Its totient is φ = 1669317932160.

The previous prime is 1957391257699. The next prime is 1957391257727. The reversal of 1957391257723 is 3277521937591.

It is not a de Polignac number, because 1957391257723 - 2⁵ = 1957391257691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1957391257727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16990365 + ... + 17105182.

It is an arithmetic number, because the mean of its divisors is an integer number (141769288584).

Almost surely, 2^{1957391257723} is an apocalyptic number.

1957391257723 is a deficient number, since it is larger than the sum of its proper divisors (310917359621).

1957391257723 is a wasteful number, since it uses less digits than its factorization.

1957391257723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34095882.

The product of its digits is 25004700, while the sum is 61.

The spelling of 1957391257723 in words is "one trillion, nine hundred fifty-seven billion, three hundred ninety-one million, two hundred fifty-seven thousand, seven hundred twenty-three".