61373312 has 128 divisors (see below), whose sum is σ = 164505600. Its totient is φ = 22026240.

The previous prime is 61373303. The next prime is 61373317. The reversal of 61373312 is 21337316.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61373317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127889 + ... + 128367.

It is an arithmetic number, because the mean of its divisors is an integer number (1285200).

Almost surely, 2^61373312 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 61373312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82252800).

61373312 is an abundant number, since it is smaller than the sum of its proper divisors (103132288).

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

61373312 is a wasteful number, since it uses less digits than its factorization.

61373312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524 (or 512 counting only the distinct ones).

The product of its digits is 2268, while the sum is 26.

The square root of 61373312 is about 7834.1120747664. The cubic root of 61373312 is about 394.4511139313.

It can be divided in two parts, 6137 and 3312, that added together give a palindrome (9449).

The spelling of 61373312 in words is "sixty-one million, three hundred seventy-three thousand, three hundred twelve".