61011865 has 8 divisors (see below), whose sum is σ = 73385928. Its totient is φ = 48695040.

The previous prime is 61011859. The next prime is 61011871. The reversal of 61011865 is 56811016.

It is an interprime number because it is at equal distance from previous prime (61011859) and next prime (61011871).

It can be written as a sum of positive squares in 4 ways, for example, as 6901129 + 54110736 = 2627^2 + 7356^2 .

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

It is not a de Polignac number, because 61011865 - 2¹³ = 61003673 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11926 + ... + 16255.

It is an arithmetic number, because the mean of its divisors is an integer number (9173241).

Almost surely, 2^61011865 is an apocalyptic number.

It is an amenable number.

61011865 is a deficient number, since it is larger than the sum of its proper divisors (12374063).

61011865 is a wasteful number, since it uses less digits than its factorization.

61011865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28619.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 61011865 is about 7811.0092177644. The cubic root of 61011865 is about 393.6752393546.

The spelling of 61011865 in words is "sixty-one million, eleven thousand, eight hundred sixty-five".