1957378161 has 8 divisors (see below), whose sum is σ = 2694025984. Its totient is φ = 1262824560.

The previous prime is 1957378151. The next prime is 1957378169. The reversal of 1957378161 is 1618737591.

1957378161 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1957378161 - 2²² = 1953183857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1957378161.

It is not an unprimeable number, because it can be changed into a prime (1957378169) 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, 10523446 + ... + 10523631.

It is an arithmetic number, because the mean of its divisors is an integer number (336753248).

Almost surely, 2^1957378161 is an apocalyptic number.

It is an amenable number.

1957378161 is a deficient number, since it is larger than the sum of its proper divisors (736647823).

1957378161 is a wasteful number, since it uses less digits than its factorization.

1957378161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21047111.

The product of its digits is 317520, while the sum is 48.

The square root of 1957378161 is about 44242.2666801781. The cubic root of 1957378161 is about 1250.9066831948.

The spelling of 1957378161 in words is "one billion, nine hundred fifty-seven million, three hundred seventy-eight thousand, one hundred sixty-one".