61672277839 has 4 divisors (see below), whose sum is σ = 61906773456. Its totient is φ = 61437782224.

The previous prime is 61672277813. The next prime is 61672277893. The reversal of 61672277839 is 93877227616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61672277839 - 2³¹ = 59524794191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61672277939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117247414 + ... + 117247939.

It is an arithmetic number, because the mean of its divisors is an integer number (15476693364).

Almost surely, 2^61672277839 is an apocalyptic number.

61672277839 is a deficient number, since it is larger than the sum of its proper divisors (234495617).

61672277839 is a wasteful number, since it uses less digits than its factorization.

61672277839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234495616.

The product of its digits is 10668672, while the sum is 58.

The spelling of 61672277839 in words is "sixty-one billion, six hundred seventy-two million, two hundred seventy-seven thousand, eight hundred thirty-nine".