61113865 has 16 divisors (see below), whose sum is σ = 77322240. Its totient is φ = 46301760.

The previous prime is 61113863. The next prime is 61113869. The reversal of 61113865 is 56831116.

It is not a de Polignac number, because 61113865 - 2¹ = 61113863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (61113863) 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, 3091 + ... + 11479.

It is an arithmetic number, because the mean of its divisors is an integer number (4832640).

Almost surely, 2^61113865 is an apocalyptic number.

It is an amenable number.

61113865 is a deficient number, since it is larger than the sum of its proper divisors (16208375).

61113865 is a wasteful number, since it uses less digits than its factorization.

61113865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8472.

The product of its digits is 4320, while the sum is 31.

The square root of 61113865 is about 7817.5357370466. The cubic root of 61113865 is about 393.8945000843.

The spelling of 61113865 in words is "sixty-one million, one hundred thirteen thousand, eight hundred sixty-five".