1620041656 has 16 divisors (see below), whose sum is σ = 3216259440. Its totient is φ = 762372480.

The previous prime is 1620041653. The next prime is 1620041659. The reversal of 1620041656 is 6561400261.

It is an interprime number because it is at equal distance from previous prime (1620041653) and next prime (1620041659).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620041653) 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, 5955900 + ... + 5956171.

It is an arithmetic number, because the mean of its divisors is an integer number (201016215).

Almost surely, 2^1620041656 is an apocalyptic number.

It is an amenable number.

1620041656 is a deficient number, since it is larger than the sum of its proper divisors (1596217784).

1620041656 is a wasteful number, since it uses less digits than its factorization.

1620041656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11912094 (or 11912090 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1620041656 is about 40249.7410674901. The cubic root of 1620041656 is about 1174.4703587907.

The spelling of 1620041656 in words is "one billion, six hundred twenty million, forty-one thousand, six hundred fifty-six".