61381316 has 6 divisors (see below), whose sum is σ = 107417310. Its totient is φ = 30690656.

The previous prime is 61381303. The next prime is 61381357. The reversal of 61381316 is 61318316.

It can be written as a sum of positive squares in only one way, i.e., 37332100 + 24049216 = 6110^2 + 4904^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7672661 + ... + 7672668.

It is an arithmetic number, because the mean of its divisors is an integer number (17902885).

Almost surely, 2^61381316 is an apocalyptic number.

It is an amenable number.

61381316 is a deficient number, since it is larger than the sum of its proper divisors (46035994).

61381316 is a wasteful number, since it uses less digits than its factorization.

61381316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15345333 (or 15345331 counting only the distinct ones).

The product of its digits is 2592, while the sum is 29.

The square root of 61381316 is about 7834.6229009442. The cubic root of 61381316 is about 394.4682606323.

The spelling of 61381316 in words is "sixty-one million, three hundred eighty-one thousand, three hundred sixteen".