1020197656 has 16 divisors (see below), whose sum is σ = 1924327440. Its totient is φ = 507043680.

The previous prime is 1020197627. The next prime is 1020197663. The reversal of 1020197656 is 6567910201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380475 + ... + 383146.

It is an arithmetic number, because the mean of its divisors is an integer number (120270465).

Almost surely, 2^1020197656 is an apocalyptic number.

It is an amenable number.

1020197656 is a deficient number, since it is larger than the sum of its proper divisors (904129784).

1020197656 is a wasteful number, since it uses less digits than its factorization.

1020197656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763794 (or 763790 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 1020197656 is about 31940.5331201594. The cubic root of 1020197656 is about 1006.6877266084.

The spelling of 1020197656 in words is "one billion, twenty million, one hundred ninety-seven thousand, six hundred fifty-six".