61019728694 has 16 divisors (see below), whose sum is σ = 93685798800. Its totient is φ = 29791547520.

The previous prime is 61019728667. The next prime is 61019728727. The reversal of 61019728694 is 49682791016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193754 + ... + 399474.

It is an arithmetic number, because the mean of its divisors is an integer number (5855362425).

Almost surely, 2^61019728694 is an apocalyptic number.

61019728694 is a deficient number, since it is larger than the sum of its proper divisors (32666070106).

61019728694 is a wasteful number, since it uses less digits than its factorization.

61019728694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209215.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 61019728694 in words is "sixty-one billion, nineteen million, seven hundred twenty-eight thousand, six hundred ninety-four".