61220142274 has 4 divisors (see below), whose sum is σ = 91830213414. Its totient is φ = 30610071136.

The previous prime is 61220142271. The next prime is 61220142287. The reversal of 61220142274 is 47224102216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 48067493049 + 13152649225 = 219243^2 + 114685^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (61220142271) 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 as a sum of consecutive naturals, namely, 15305035567 + ... + 15305035570.

Almost surely, 2^61220142274 is an apocalyptic number.

61220142274 is a deficient number, since it is larger than the sum of its proper divisors (30610071140).

61220142274 is a wasteful number, since it uses less digits than its factorization.

61220142274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30610071139.

The product of its (nonzero) digits is 10752, while the sum is 31.

The spelling of 61220142274 in words is "sixty-one billion, two hundred twenty million, one hundred forty-two thousand, two hundred seventy-four".