1957007587397 has 8 divisors (see below), whose sum is σ = 1960435402200. Its totient is φ = 1953580203520.

The previous prime is 1957007587387. The next prime is 1957007587411. The reversal of 1957007587397 is 7937857007591.

It can be written as a sum of positive squares in 4 ways, for example, as 1302225604801 + 654781982596 = 1141151^2 + 809186^2 .

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 1957007587397 - 2¹² = 1957007583301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1957007587357) 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, 9773747 + ... + 9971967.

It is an arithmetic number, because the mean of its divisors is an integer number (245054425275).

Almost surely, 2^{1957007587397} is an apocalyptic number.

It is an amenable number.

1957007587397 is a deficient number, since it is larger than the sum of its proper divisors (3427814803).

1957007587397 is a wasteful number, since it uses less digits than its factorization.

1957007587397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215463.

The product of its (nonzero) digits is 116688600, while the sum is 68.

The spelling of 1957007587397 in words is "one trillion, nine hundred fifty-seven billion, seven million, five hundred eighty-seven thousand, three hundred ninety-seven".