61318851 has 16 divisors (see below), whose sum is σ = 93070080. Its totient is φ = 35546720.

The previous prime is 61318849. The next prime is 61318853. The reversal of 61318851 is 15881316.

It is an interprime number because it is at equal distance from previous prime (61318849) and next prime (61318853).

It is not a de Polignac number, because 61318851 - 2¹ = 61318849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (61318853) 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, 39636 + ... + 41153.

It is an arithmetic number, because the mean of its divisors is an integer number (5816880).

Almost surely, 2^61318851 is an apocalyptic number.

61318851 is a deficient number, since it is larger than the sum of its proper divisors (31751229).

61318851 is a wasteful number, since it uses less digits than its factorization.

61318851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80826.

The product of its digits is 5760, while the sum is 33.

The square root of 61318851 is about 7830.6354148307. The cubic root of 61318851 is about 394.3344043563.

The spelling of 61318851 in words is "sixty-one million, three hundred eighteen thousand, eight hundred fifty-one".