61214042779 has 16 divisors (see below), whose sum is σ = 62249904000. Its totient is φ = 60185309184.

The previous prime is 61214042777. The next prime is 61214042863. The reversal of 61214042779 is 97724041216.

It is a cyclic number.

It is not a de Polignac number, because 61214042779 - 2¹ = 61214042777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61214042777) 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, 21884209 + ... + 21887005.

It is an arithmetic number, because the mean of its divisors is an integer number (3890619000).

Almost surely, 2^61214042779 is an apocalyptic number.

61214042779 is a deficient number, since it is larger than the sum of its proper divisors (1035861221).

61214042779 is a wasteful number, since it uses less digits than its factorization.

61214042779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3942.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 61214042779 in words is "sixty-one billion, two hundred fourteen million, forty-two thousand, seven hundred seventy-nine".