1613977139776 has 21 divisors (see below), whose sum is σ = 3202756054851. Its totient is φ = 806983488192.

The previous prime is 1613977139773. The next prime is 1613977139777. The reversal of 1613977139776 is 6779317793161.

The square root of 1613977139776 is 1270424.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1613977139773) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 10083991 + ... + 10242793.

Almost surely, 2^{1613977139776} is an apocalyptic number.

1613977139776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1613977139776 is the 1270424-th square number.

It is an amenable number.

1613977139776 is a deficient number, since it is larger than the sum of its proper divisors (1588778915075).

1613977139776 is an frugal number, since it uses more digits than its factorization.

1613977139776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317618 (or 158805 counting only the distinct ones).

The product of its digits is 63011844, while the sum is 67.

The spelling of 1613977139776 in words is "one trillion, six hundred thirteen billion, nine hundred seventy-seven million, one hundred thirty-nine thousand, seven hundred seventy-six".