1211774979744 has 144 divisors (see below), whose sum is σ = 3938713938432. Its totient is φ = 346182280704.

The previous prime is 1211774979707. The next prime is 1211774979791. The reversal of 1211774979744 is 4479794771121.

1211774979744 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 77 + 497 + 9 + 74 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×1211774979744² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21044497 + ... + 21101999.

It is an arithmetic number, because the mean of its divisors is an integer number (27352180128).

Almost surely, 2^{1211774979744} is an apocalyptic number.

1211774979744 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1211774979744 is an abundant number, since it is smaller than the sum of its proper divisors (2726938958688).

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

1211774979744 is a wasteful number, since it uses less digits than its factorization.

1211774979744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67979 (or 67968 counting only the distinct ones).

The product of its digits is 24893568, while the sum is 63.

The spelling of 1211774979744 in words is "one trillion, two hundred eleven billion, seven hundred seventy-four million, nine hundred seventy-nine thousand, seven hundred forty-four".