61520600 has 48 divisors (see below), whose sum is σ = 147981600. Its totient is φ = 23757440.

The previous prime is 61520597. The next prime is 61520611. The reversal of 61520600 is 602516.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 497 + ... + 11103.

It is an arithmetic number, because the mean of its divisors is an integer number (3082950).

Almost surely, 2^61520600 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61520600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73990800).

61520600 is an abundant number, since it is smaller than the sum of its proper divisors (86461000).

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

61520600 is a wasteful number, since it uses less digits than its factorization.

61520600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10652 (or 10643 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 61520600 is about 7843.5068687418. The cubic root of 61520600 is about 394.7664057078.

The spelling of 61520600 in words is "sixty-one million, five hundred twenty thousand, six hundred".