61636413 has 16 divisors (see below), whose sum is σ = 85796096. Its totient is φ = 39320640.

The previous prime is 61636409. The next prime is 61636423. The reversal of 61636413 is 31463616.

It is not a de Polignac number, because 61636413 - 2² = 61636409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61636423) 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, 2220 + ... + 11322.

It is an arithmetic number, because the mean of its divisors is an integer number (5362256).

Almost surely, 2^61636413 is an apocalyptic number.

It is an amenable number.

61636413 is a deficient number, since it is larger than the sum of its proper divisors (24159683).

61636413 is a wasteful number, since it uses less digits than its factorization.

61636413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9204.

The product of its digits is 7776, while the sum is 30.

The square root of 61636413 is about 7850.8861283297. The cubic root of 61636413 is about 395.0139673531.

The spelling of 61636413 in words is "sixty-one million, six hundred thirty-six thousand, four hundred thirteen".