61534336647 has 16 divisors (see below), whose sum is σ = 93787366400. Its totient is φ = 35154693792.

The previous prime is 61534336621. The next prime is 61534336657. The reversal of 61534336647 is 74663343516.

It is not a de Polignac number, because 61534336647 - 2⁶ = 61534336583 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61534336596 and 61534336605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61534336657) 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, 226543 + ... + 417600.

It is an arithmetic number, because the mean of its divisors is an integer number (5861710400).

Almost surely, 2^61534336647 is an apocalyptic number.

61534336647 is a deficient number, since it is larger than the sum of its proper divisors (32253029753).

61534336647 is a wasteful number, since it uses less digits than its factorization.

61534336647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648702.

The product of its digits is 3265920, while the sum is 48.

The spelling of 61534336647 in words is "sixty-one billion, five hundred thirty-four million, three hundred thirty-six thousand, six hundred forty-seven".