61456520 has 64 divisors (see below), whose sum is σ = 142067520. Its totient is φ = 23920384.

The previous prime is 61456511. The next prime is 61456531. The reversal of 61456520 is 2565416.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355154 + ... + 355326.

It is an arithmetic number, because the mean of its divisors is an integer number (2219805).

Almost surely, 2^61456520 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 61456520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71033760).

61456520 is an abundant number, since it is smaller than the sum of its proper divisors (80611000).

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

61456520 is a wasteful number, since it uses less digits than its factorization.

61456520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 61456520 is about 7839.4208969796. The cubic root of 61456520 is about 394.6292948898.

The spelling of 61456520 in words is "sixty-one million, four hundred fifty-six thousand, five hundred twenty".