61512630 has 64 divisors (see below), whose sum is σ = 157966848. Its totient is φ = 15275520.

The previous prime is 61512623. The next prime is 61512653. The reversal of 61512630 is 3621516.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61512630.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51945 + ... + 53115.

It is an arithmetic number, because the mean of its divisors is an integer number (2468232).

Almost surely, 2^61512630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61512630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78983424).

61512630 is an abundant number, since it is smaller than the sum of its proper divisors (96454218).

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

61512630 is a wasteful number, since it uses less digits than its factorization.

61512630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 61512630 is about 7842.9987887287. The cubic root of 61512630 is about 394.7493576289.

The spelling of 61512630 in words is "sixty-one million, five hundred twelve thousand, six hundred thirty".