1957638320077 has 8 divisors (see below), whose sum is σ = 2135627825760. Its totient is φ = 1779652545360.

The previous prime is 1957638320069. The next prime is 1957638320093. The reversal of 1957638320077 is 7700238367591.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1957638320077 - 2³ = 1957638320069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1957638320377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227074 + ... + 1991692.

It is an arithmetic number, because the mean of its divisors is an integer number (266953478220).

Almost surely, 2^{1957638320077} is an apocalyptic number.

It is an amenable number.

1957638320077 is a deficient number, since it is larger than the sum of its proper divisors (177989505683).

1957638320077 is a wasteful number, since it uses less digits than its factorization.

1957638320077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865483.

The product of its (nonzero) digits is 13335840, while the sum is 58.

The spelling of 1957638320077 in words is "one trillion, nine hundred fifty-seven billion, six hundred thirty-eight million, three hundred twenty thousand, seventy-seven".