61347654739 has 16 divisors (see below), whose sum is σ = 70598062080. Its totient is φ = 52219680480.

The previous prime is 61347654691. The next prime is 61347654763. The reversal of 61347654739 is 93745674316.

61347654739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 61347654739 - 2¹⁹ = 61347130451 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61347654739.

It is not an unprimeable number, because it can be changed into a prime (61347664739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 877302 + ... + 944644.

It is an arithmetic number, because the mean of its divisors is an integer number (4412378880).

Almost surely, 2^61347654739 is an apocalyptic number.

61347654739 is a deficient number, since it is larger than the sum of its proper divisors (9250407341).

61347654739 is a wasteful number, since it uses less digits than its factorization.

61347654739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68250.

The product of its digits is 11430720, while the sum is 55.

The spelling of 61347654739 in words is "sixty-one billion, three hundred forty-seven million, six hundred fifty-four thousand, seven hundred thirty-nine".