1656893741 has 4 divisors (see below), whose sum is σ = 1672980192. Its totient is φ = 1640807292.

The previous prime is 1656893737. The next prime is 1656893753. The reversal of 1656893741 is 1473986561.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1473986561 = 907 ⋅1625123.

It is a cyclic number.

It is not a de Polignac number, because 1656893741 - 2² = 1656893737 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 1656893741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656898741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8043071 + ... + 8043276.

It is an arithmetic number, because the mean of its divisors is an integer number (418245048).

Almost surely, 2^1656893741 is an apocalyptic number.

It is an amenable number.

1656893741 is a deficient number, since it is larger than the sum of its proper divisors (16086451).

1656893741 is a wasteful number, since it uses less digits than its factorization.

1656893741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16086450.

The product of its digits is 1088640, while the sum is 50.

The square root of 1656893741 is about 40704.9596609553. The cubic root of 1656893741 is about 1183.3091401697.

The spelling of 1656893741 in words is "one billion, six hundred fifty-six million, eight hundred ninety-three thousand, seven hundred forty-one".