61018378274 has 24 divisors (see below), whose sum is σ = 106575503760. Its totient is φ = 26125027656.

The previous prime is 61018378243. The next prime is 61018378331. The reversal of 61018378274 is 47287381016.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205652 + ... + 405375.

It is an arithmetic number, because the mean of its divisors is an integer number (4440645990).

Almost surely, 2^61018378274 is an apocalyptic number.

61018378274 is a deficient number, since it is larger than the sum of its proper divisors (45557125486).

61018378274 is a wasteful number, since it uses less digits than its factorization.

61018378274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612062 (or 612055 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 47.

The spelling of 61018378274 in words is "sixty-one billion, eighteen million, three hundred seventy-eight thousand, two hundred seventy-four".