61543238858 has 16 divisors (see below), whose sum is σ = 96057861120. Its totient is φ = 29548658256.

The previous prime is 61543238849. The next prime is 61543238921. The reversal of 61543238858 is 85883234516.

It is a super-2 number, since 2×61543238858² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6171578 + ... + 6181541.

It is an arithmetic number, because the mean of its divisors is an integer number (6003616320).

Almost surely, 2^61543238858 is an apocalyptic number.

61543238858 is a deficient number, since it is larger than the sum of its proper divisors (34514622262).

61543238858 is a wasteful number, since it uses less digits than its factorization.

61543238858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12353221.

The product of its digits is 5529600, while the sum is 53.

The spelling of 61543238858 in words is "sixty-one billion, five hundred forty-three million, two hundred thirty-eight thousand, eight hundred fifty-eight".