61161400 has 48 divisors (see below), whose sum is σ = 143629200. Its totient is φ = 24218880.

The previous prime is 61161383. The next prime is 61161403. The reversal of 61161400 is 416116.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61161403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19116 + ... + 22084.

It is an arithmetic number, because the mean of its divisors is an integer number (2992275).

Almost surely, 2^61161400 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 61161400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71814600).

61161400 is an abundant number, since it is smaller than the sum of its proper divisors (82467800).

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

61161400 is a wasteful number, since it uses less digits than its factorization.

61161400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3088 (or 3079 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 61161400 is about 7820.5754263993. The cubic root of 61161400 is about 393.9965986977.

Adding to 61161400 its reverse (416116), we get a palindrome (61577516).

The spelling of 61161400 in words is "sixty-one million, one hundred sixty-one thousand, four hundred".