61552904 has 64 divisors (see below), whose sum is σ = 137967360. Its totient is φ = 25194240.

The previous prime is 61552901. The next prime is 61552969. The reversal of 61552904 is 40925516.

61552904 = T₂₀₅ + T₂₀₆ + ... + T₇₂₂.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (61552901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126149 + ... + 126635.

It is an arithmetic number, because the mean of its divisors is an integer number (2155740).

Almost surely, 2^61552904 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 61552904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68983680).

61552904 is an abundant number, since it is smaller than the sum of its proper divisors (76414456).

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

61552904 is a wasteful number, since it uses less digits than its factorization.

61552904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 61552904 is about 7845.5658814390. The cubic root of 61552904 is about 394.8354898982.

The spelling of 61552904 in words is "sixty-one million, five hundred fifty-two thousand, nine hundred four".