1291456940674 has 16 divisors (see below), whose sum is σ = 1942462057536. Its totient is φ = 643971139600.

The previous prime is 1291456940671. The next prime is 1291456940681. The reversal of 1291456940674 is 4760496541921.

It is a happy number.

It is a super-2 number, since 2×1291456940674² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1291456940671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1283019 + ... + 2056465.

It is an arithmetic number, because the mean of its divisors is an integer number (121403878596).

Almost surely, 2^{1291456940674} is an apocalyptic number.

1291456940674 is a deficient number, since it is larger than the sum of its proper divisors (651005116862).

1291456940674 is a wasteful number, since it uses less digits than its factorization.

1291456940674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775721.

The product of its (nonzero) digits is 13063680, while the sum is 58.

The spelling of 1291456940674 in words is "one trillion, two hundred ninety-one billion, four hundred fifty-six million, nine hundred forty thousand, six hundred seventy-four".