61651104 has 24 divisors (see below), whose sum is σ = 161834400. Its totient is φ = 20550336.

The previous prime is 61651103. The next prime is 61651123. The reversal of 61651104 is 40115616.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (61651103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321004 + ... + 321195.

It is an arithmetic number, because the mean of its divisors is an integer number (6743100).

Almost surely, 2^61651104 is an apocalyptic number.

It is an amenable number.

61651104 is an abundant number, since it is smaller than the sum of its proper divisors (100183296).

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

61651104 is a wasteful number, since it uses less digits than its factorization.

61651104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642212 (or 642204 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 61651104 is about 7851.8216994529. The cubic root of 61651104 is about 395.0453486363.

The spelling of 61651104 in words is "sixty-one million, six hundred fifty-one thousand, one hundred four".