61580016 has 60 divisors (see below), whose sum is σ = 179841168. Its totient is φ = 19633152.

The previous prime is 61580009. The next prime is 61580017. The reversal of 61580016 is 61008516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61580017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5985 + ... + 12608.

Almost surely, 2^61580016 is an apocalyptic number.

It is an amenable number.

61580016 is an abundant number, since it is smaller than the sum of its proper divisors (118261152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61580016 is a wasteful number, since it uses less digits than its factorization.

61580016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18630 (or 18621 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 61580016 is about 7847.2935461852. The cubic root of 61580016 is about 394.8934520077.

The spelling of 61580016 in words is "sixty-one million, five hundred eighty thousand, sixteen".