61872365047 has 4 divisors (see below), whose sum is σ = 62031420360. Its totient is φ = 61713309736.

The previous prime is 61872365017. The next prime is 61872365059. The reversal of 61872365047 is 74056327816.

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 61872365047 - 2⁷ = 61872364919 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 (61872365017) 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, 79527073 + ... + 79527850.

It is an arithmetic number, because the mean of its divisors is an integer number (15507855090).

Almost surely, 2^61872365047 is an apocalyptic number.

61872365047 is a deficient number, since it is larger than the sum of its proper divisors (159055313).

61872365047 is a wasteful number, since it uses less digits than its factorization.

61872365047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159055312.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 61872365047 in words is "sixty-one billion, eight hundred seventy-two million, three hundred sixty-five thousand, forty-seven".