3705257657 has 4 divisors (see below), whose sum is σ = 3866355840. Its totient is φ = 3544159476.

The previous prime is 3705257629. The next prime is 3705257681. The reversal of 3705257657 is 7567525073.

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 3705257657 - 2¹² = 3705253561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3705287657) 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, 80549057 + ... + 80549102.

It is an arithmetic number, because the mean of its divisors is an integer number (966588960).

Almost surely, 2^3705257657 is an apocalyptic number.

It is an amenable number.

3705257657 is a deficient number, since it is larger than the sum of its proper divisors (161098183).

3705257657 is a wasteful number, since it uses less digits than its factorization.

3705257657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161098182.

The product of its (nonzero) digits is 1543500, while the sum is 47.

The square root of 3705257657 is about 60870.8276352474. The cubic root of 3705257657 is about 1547.4126319834.

The spelling of 3705257657 in words is "three billion, seven hundred five million, two hundred fifty-seven thousand, six hundred fifty-seven".