613402881 has 32 divisors (see below), whose sum is σ = 1023697920. Its totient is φ = 318060864.

The previous prime is 613402873. The next prime is 613402943. The reversal of 613402881 is 188204316.

It is not a de Polignac number, because 613402881 - 2³ = 613402873 is a prime.

It is a super-2 number, since 2×613402881² = 752526188838200322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (613402831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2935 + ... + 35148.

It is an arithmetic number, because the mean of its divisors is an integer number (31990560).

Almost surely, 2^613402881 is an apocalyptic number.

It is an amenable number.

613402881 is a deficient number, since it is larger than the sum of its proper divisors (410295039).

613402881 is a wasteful number, since it uses less digits than its factorization.

613402881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38165.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 613402881 is about 24766.9715750634. The cubic root of 613402881 is about 849.6667117787. Note that the first 3 decimals are identical.

The spelling of 613402881 in words is "six hundred thirteen million, four hundred two thousand, eight hundred eighty-one".