1956785972 has 6 divisors (see below), whose sum is σ = 3424375458. Its totient is φ = 978392984.

The previous prime is 1956785953. The next prime is 1956785977. The reversal of 1956785972 is 2795876591.

It can be written as a sum of positive squares in only one way, i.e., 1947809956 + 8976016 = 44134^2 + 2996^2 .

It is a super-2 number, since 2×1956785972² = 7658022680431969568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1956785977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244598243 + ... + 244598250.

It is an arithmetic number, because the mean of its divisors is an integer number (570729243).

Almost surely, 2^1956785972 is an apocalyptic number.

It is an amenable number.

1956785972 is a deficient number, since it is larger than the sum of its proper divisors (1467589486).

1956785972 is a wasteful number, since it uses less digits than its factorization.

1956785972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489196497 (or 489196495 counting only the distinct ones).

The product of its digits is 9525600, while the sum is 59.

The square root of 1956785972 is about 44235.5736031534. The cubic root of 1956785972 is about 1250.7805198895.

The spelling of 1956785972 in words is "one billion, nine hundred fifty-six million, seven hundred eighty-five thousand, nine hundred seventy-two".