1537640057 has 4 divisors (see below), whose sum is σ = 1540722000. Its totient is φ = 1534558116.

The previous prime is 1537640047. The next prime is 1537640063. The reversal of 1537640057 is 7500467351.

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 1537640057 - 2⁸ = 1537639801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1537640057.

It is not an unprimeable number, because it can be changed into a prime (1537640047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1540223 + ... + 1541220.

It is an arithmetic number, because the mean of its divisors is an integer number (385180500).

Almost surely, 2^1537640057 is an apocalyptic number.

It is an amenable number.

1537640057 is a deficient number, since it is larger than the sum of its proper divisors (3081943).

1537640057 is an equidigital number, since it uses as much as digits as its factorization.

1537640057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3081942.

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 1537640057 is about 39212.7537543591. The cubic root of 1537640057 is about 1154.2101649492.

The spelling of 1537640057 in words is "one billion, five hundred thirty-seven million, six hundred forty thousand, fifty-seven".