61100080 has 20 divisors (see below), whose sum is σ = 142057872. Its totient is φ = 24440000.

The previous prime is 61100077. The next prime is 61100089. The reversal of 61100080 is 8000116.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (61100089) 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, 381796 + ... + 381955.

Almost surely, 2^61100080 is an apocalyptic number.

It is an amenable number.

61100080 is an abundant number, since it is smaller than the sum of its proper divisors (80957792).

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

61100080 is a wasteful number, since it uses less digits than its factorization.

61100080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763764 (or 763758 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 61100080 is about 7816.6540156259. The cubic root of 61100080 is about 393.8648819063.

Adding to 61100080 its reverse (8000116), we get a palindrome (69100196).

The spelling of 61100080 in words is "sixty-one million, one hundred thousand, eighty".