61617772834 has 16 divisors (see below), whose sum is σ = 92667133440. Its totient is φ = 30728777040.

The previous prime is 61617772831. The next prime is 61617772849. The reversal of 61617772834 is 43827771616.

It is not an unprimeable number, because it can be changed into a prime (61617772831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2994172 + ... + 3014680.

It is an arithmetic number, because the mean of its divisors is an integer number (5791695840).

Almost surely, 2^61617772834 is an apocalyptic number.

61617772834 is a deficient number, since it is larger than the sum of its proper divisors (31049360606).

61617772834 is a wasteful number, since it uses less digits than its factorization.

61617772834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24345.

The product of its digits is 2370816, while the sum is 52.

The spelling of 61617772834 in words is "sixty-one billion, six hundred seventeen million, seven hundred seventy-two thousand, eight hundred thirty-four".