61855648 has 48 divisors (see below), whose sum is σ = 127975680. Its totient is φ = 29373696.

The previous prime is 61855643. The next prime is 61855669. The reversal of 61855648 is 84655816.

It is a super-2 number, since 2×61855648² = 7652242378999808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61855643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168361 + ... + 168727.

It is an arithmetic number, because the mean of its divisors is an integer number (2666160).

Almost surely, 2^61855648 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 61855648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63987840).

61855648 is an abundant number, since it is smaller than the sum of its proper divisors (66120032).

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

61855648 is a wasteful number, since it uses less digits than its factorization.

61855648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629 (or 621 counting only the distinct ones).

The product of its digits is 230400, while the sum is 43.

The square root of 61855648 is about 7864.8361712117. The cubic root of 61855648 is about 395.4817558363.

The spelling of 61855648 in words is "sixty-one million, eight hundred fifty-five thousand, six hundred forty-eight".