1631044057 has 4 divisors (see below), whose sum is σ = 1701959040. Its totient is φ = 1560129076.

The previous prime is 1631044049. The next prime is 1631044061. The reversal of 1631044057 is 7504401361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1631044057 - 2³ = 1631044049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1631044007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35457457 + ... + 35457502.

It is an arithmetic number, because the mean of its divisors is an integer number (425489760).

Almost surely, 2^1631044057 is an apocalyptic number.

It is an amenable number.

1631044057 is a deficient number, since it is larger than the sum of its proper divisors (70914983).

1631044057 is an equidigital number, since it uses as much as digits as its factorization.

1631044057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70914982.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 1631044057 is about 40386.1864627003. The cubic root of 1631044057 is about 1177.1231405333.

The spelling of 1631044057 in words is "one billion, six hundred thirty-one million, forty-four thousand, fifty-seven".