61455264 has 96 divisors (see below), whose sum is σ = 181367424. Its totient is φ = 18078720.

The previous prime is 61455239. The next prime is 61455271. The reversal of 61455264 is 46255416.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

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, 27634 + ... + 29774.

It is an arithmetic number, because the mean of its divisors is an integer number (1889244).

Almost surely, 2^61455264 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 61455264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90683712).

61455264 is an abundant number, since it is smaller than the sum of its proper divisors (119912160).

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

61455264 is a wasteful number, since it uses less digits than its factorization.

61455264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2190 (or 2182 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

The square root of 61455264 is about 7839.3407886123. The cubic root of 61455264 is about 394.6266064971.

The spelling of 61455264 in words is "sixty-one million, four hundred fifty-five thousand, two hundred sixty-four".