1214769891556 has 27 divisors (see below), whose sum is σ = 2302007308713. Its totient is φ = 560649800880.

The previous prime is 1214769891551. The next prime is 1214769891557. The reversal of 1214769891556 is 6551989674121.

The square root of 1214769891556 is 1102166.

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

It can be written as a sum of positive squares in only one way, i.e., 179699688100 + 1035070203456 = 423910^2 + 1017384^2 .

It is a super-2 number, since 2×1214769891556² (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 (1214769891551) 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, 28635121 + ... + 28677511.

Almost surely, 2^{1214769891556} is an apocalyptic number.

1214769891556 is the 1102166-th square number.

It is an amenable number.

1214769891556 is a deficient number, since it is larger than the sum of its proper divisors (1087237417157).

1214769891556 is an frugal number, since it uses more digits than its factorization.

1214769891556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84812 (or 42406 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 64.

Multiplying 1214769891556 by its sum of digits (64), we get a square (77745273059584 = 8817328²).

The spelling of 1214769891556 in words is "one trillion, two hundred fourteen billion, seven hundred sixty-nine million, eight hundred ninety-one thousand, five hundred fifty-six".