1957322531465 has 24 divisors (see below), whose sum is σ = 2738752551432. Its totient is φ = 1338975912960.

The previous prime is 1957322531459. The next prime is 1957322531561. The reversal of 1957322531465 is 5641352237591.

It can be written as a sum of positive squares in 4 ways, for example, as 226129731961 + 1731192799504 = 475531^2 + 1315748^2 .

It is not a de Polignac number, because 1957322531465 - 2²⁶ = 1957255422601 is a prime.

It is a super-2 number, since 2×1957322531465² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9385064 + ... + 9591353.

It is an arithmetic number, because the mean of its divisors is an integer number (114114689643).

Almost surely, 2^{1957322531465} is an apocalyptic number.

It is an amenable number.

1957322531465 is a deficient number, since it is larger than the sum of its proper divisors (781430019967).

1957322531465 is a wasteful number, since it uses less digits than its factorization.

1957322531465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18976857 (or 18976850 counting only the distinct ones).

The product of its digits is 6804000, while the sum is 53.

The spelling of 1957322531465 in words is "one trillion, nine hundred fifty-seven billion, three hundred twenty-two million, five hundred thirty-one thousand, four hundred sixty-five".