1613135381 has 16 divisors (see below), whose sum is σ = 1896326208. Its totient is φ = 1352841600.

The previous prime is 1613135371. The next prime is 1613135387. The reversal of 1613135381 is 1835313161.

It is not a de Polignac number, because 1613135381 - 2²² = 1608941077 is a prime.

It is a super-2 number, since 2×1613135381² = 5204411514868030322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1613135387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 359705 + ... + 364161.

It is an arithmetic number, because the mean of its divisors is an integer number (118520388).

Almost surely, 2^1613135381 is an apocalyptic number.

1613135381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1613135381 is a deficient number, since it is larger than the sum of its proper divisors (283190827).

1613135381 is a wasteful number, since it uses less digits than its factorization.

1613135381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7012.

The product of its digits is 6480, while the sum is 32.

The square root of 1613135381 is about 40163.8566499782. The cubic root of 1613135381 is about 1172.7990501709.

The spelling of 1613135381 in words is "one billion, six hundred thirteen million, one hundred thirty-five thousand, three hundred eighty-one".