61489856 has 56 divisors (see below), whose sum is σ = 130881120. Its totient is φ = 28588032.

The previous prime is 61489849. The next prime is 61489861. The reversal of 61489856 is 65898416.

It is a self number, because there is not a number n which added to its sum of digits gives 61489856.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53900 + ... + 55028.

Almost surely, 2^61489856 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 61489856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65440560).

61489856 is an abundant number, since it is smaller than the sum of its proper divisors (69391264).

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

61489856 is a wasteful number, since it uses less digits than its factorization.

61489856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201 (or 1191 counting only the distinct ones).

The product of its digits is 414720, while the sum is 47.

The square root of 61489856 is about 7841.5467861896. The cubic root of 61489856 is about 394.7006352144.

The spelling of 61489856 in words is "sixty-one million, four hundred eighty-nine thousand, eight hundred fifty-six".