61501917274 has 16 divisors (see below), whose sum is σ = 106475740416. Its totient is φ = 26096994000.

The previous prime is 61501917193. The next prime is 61501917293. The reversal of 61501917274 is 47271910516.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 61501917274.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21746082 + ... + 21748909.

It is an arithmetic number, because the mean of its divisors is an integer number (6654733776).

Almost surely, 2^61501917274 is an apocalyptic number.

61501917274 is a deficient number, since it is larger than the sum of its proper divisors (44973823142).

61501917274 is a wasteful number, since it uses less digits than its factorization.

61501917274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43495101.

The product of its (nonzero) digits is 105840, while the sum is 43.

The spelling of 61501917274 in words is "sixty-one billion, five hundred one million, nine hundred seventeen thousand, two hundred seventy-four".