61015016 has 16 divisors (see below), whose sum is σ = 114531300. Its totient is φ = 30473344.

The previous prime is 61015013. The next prime is 61015049. The reversal of 61015016 is 61051016.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 49140100 + 11874916 = 7010^2 + 3446^2 .

It is not an unprimeable number, because it can be changed into a prime (61015013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4340 + ... + 11868.

Almost surely, 2^61015016 is an apocalyptic number.

It is an amenable number.

61015016 is a deficient number, since it is larger than the sum of its proper divisors (53516284).

61015016 is a wasteful number, since it uses less digits than its factorization.

61015016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8548 (or 8544 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 61015016 is about 7811.2109176491. The cubic root of 61015016 is about 393.6820164480.

The spelling of 61015016 in words is "sixty-one million, fifteen thousand, sixteen".