61368513 has 8 divisors (see below), whose sum is σ = 83820576. Its totient is φ = 39914400.

The previous prime is 61368497. The next prime is 61368523. The reversal of 61368513 is 31586316.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61368513 - 2⁴ = 61368497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61368523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249343 + ... + 249588.

It is an arithmetic number, because the mean of its divisors is an integer number (10477572).

Almost surely, 2^61368513 is an apocalyptic number.

It is an amenable number.

61368513 is a deficient number, since it is larger than the sum of its proper divisors (22452063).

61368513 is a wasteful number, since it uses less digits than its factorization.

61368513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498975.

The product of its digits is 12960, while the sum is 33.

The square root of 61368513 is about 7833.8057800791. The cubic root of 61368513 is about 394.4408324796.

The spelling of 61368513 in words is "sixty-one million, three hundred sixty-eight thousand, five hundred thirteen".