1395783661874 has 16 divisors (see below), whose sum is σ = 2392835951616. Its totient is φ = 598177008000.

The previous prime is 1395783661849. The next prime is 1395783661903. The reversal of 1395783661874 is 4781663875931.

It is a happy number.

It is a super-2 number, since 2×1395783661874² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 782207 + ... + 1844834.

It is an arithmetic number, because the mean of its divisors is an integer number (149552246976).

Almost surely, 2^{1395783661874} is an apocalyptic number.

1395783661874 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1395783661874 is a deficient number, since it is larger than the sum of its proper divisors (997052289742).

1395783661874 is a wasteful number, since it uses less digits than its factorization.

1395783661874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665001.

The product of its digits is 182891520, while the sum is 68.

The spelling of 1395783661874 in words is "one trillion, three hundred ninety-five billion, seven hundred eighty-three million, six hundred sixty-one thousand, eight hundred seventy-four".