61381090 has 16 divisors (see below), whose sum is σ = 110714688. Its totient is φ = 24501616.

The previous prime is 61381037. The next prime is 61381093. The reversal of 61381090 is 9018316.

It is a happy number.

61381090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (61381093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1072 + ... + 11131.

It is an arithmetic number, because the mean of its divisors is an integer number (6919668).

Almost surely, 2^61381090 is an apocalyptic number.

61381090 is a deficient number, since it is larger than the sum of its proper divisors (49333598).

61381090 is a wasteful number, since it uses less digits than its factorization.

61381090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12713.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 61381090 is about 7834.6084777735. The cubic root of 61381090 is about 394.4677765005.

The spelling of 61381090 in words is "sixty-one million, three hundred eighty-one thousand, ninety".