61534009189 has 4 divisors (see below), whose sum is σ = 62542763500. Its totient is φ = 60525254880.

The previous prime is 61534009153. The next prime is 61534009241. The reversal of 61534009189 is 98190043516.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1445292289 + 60088716900 = 38017^2 + 245130^2 .

It is a cyclic number.

It is not a de Polignac number, because 61534009189 - 2¹⁵ = 61533976421 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 (61534009109) 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, 504377064 + ... + 504377185.

It is an arithmetic number, because the mean of its divisors is an integer number (15635690875).

Almost surely, 2^61534009189 is an apocalyptic number.

It is an amenable number.

61534009189 is a deficient number, since it is larger than the sum of its proper divisors (1008754311).

61534009189 is a wasteful number, since it uses less digits than its factorization.

61534009189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008754310.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 61534009189 in words is "sixty-one billion, five hundred thirty-four million, nine thousand, one hundred eighty-nine".