61613172 has 36 divisors (see below), whose sum is σ = 158303236. Its totient is φ = 20200320.

The previous prime is 61613171. The next prime is 61613179. The reversal of 61613172 is 27131616.

It can be written as a sum of positive squares in 2 ways, for example, as 14333796 + 47279376 = 3786^2 + 6876^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61613171) 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, 11833 + ... + 16224.

Almost surely, 2^61613172 is an apocalyptic number.

It is an amenable number.

61613172 is an abundant number, since it is smaller than the sum of its proper divisors (96690064).

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

61613172 is a wasteful number, since it uses less digits than its factorization.

61613172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28128 (or 28123 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 61613172 is about 7849.4058373867. The cubic root of 61613172 is about 394.9643123235.

Adding to 61613172 its reverse (27131616), we get a palindrome (88744788).

The spelling of 61613172 in words is "sixty-one million, six hundred thirteen thousand, one hundred seventy-two".