1261483892964 has 27 divisors (see below), whose sum is σ = 3188767986313. Its totient is φ = 420492384672.

The previous prime is 1261483892941. The next prime is 1261483892969. The reversal of 1261483892964 is 4692983841621.

The square root of 1261483892964 is 1123158.

It is a perfect power (a square), and thus also a powerful number.

1261483892964 is a `hidden beast` number, since 1 + 2 + 6 + 1 + 483 + 8 + 92 + 9 + 64 = 666.

It can be written as a sum of positive squares in only one way, i.e., 590054422500 + 671429470464 = 768150^2 + 819408^2 .

It is a super-2 number, since 2×1261483892964² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1261483892969) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6645352 + ... + 6832544.

Almost surely, 2^{1261483892964} is an apocalyptic number.

1261483892964 is the 1123158-th square number.

It is an amenable number.

1261483892964 is an abundant number, since it is smaller than the sum of its proper divisors (1927284093349).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1261483892964 is an frugal number, since it uses more digits than its factorization.

1261483892964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374396 (or 187198 counting only the distinct ones).

The product of its digits is 35831808, while the sum is 63.

The spelling of 1261483892964 in words is "one trillion, two hundred sixty-one billion, four hundred eighty-three million, eight hundred ninety-two thousand, nine hundred sixty-four".