61306863 has 16 divisors (see below), whose sum is σ = 88049280. Its totient is φ = 37818144.

The previous prime is 61306859. The next prime is 61306877. The reversal of 61306863 is 36860316.

It is not a de Polignac number, because 61306863 - 2² = 61306859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61306853) 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, 10056 + ... + 14957.

It is an arithmetic number, because the mean of its divisors is an integer number (5503080).

Almost surely, 2^61306863 is an apocalyptic number.

61306863 is a deficient number, since it is larger than the sum of its proper divisors (26742417).

61306863 is a wasteful number, since it uses less digits than its factorization.

61306863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25078.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 61306863 is about 7829.8699222912. The cubic root of 61306863 is about 394.3087048698.

The spelling of 61306863 in words is "sixty-one million, three hundred six thousand, eight hundred sixty-three".