61618541275 has 24 divisors (see below), whose sum is σ = 80915133600. Its totient is φ = 46387330560.

The previous prime is 61618541251. The next prime is 61618541279. The reversal of 61618541275 is 57214581616.

It is not a de Polignac number, because 61618541275 - 2¹⁹ = 61618016987 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (61618541279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4347901 + ... + 4362049.

It is an arithmetic number, because the mean of its divisors is an integer number (3371463900).

Almost surely, 2^61618541275 is an apocalyptic number.

61618541275 is a deficient number, since it is larger than the sum of its proper divisors (19296592325).

61618541275 is a wasteful number, since it uses less digits than its factorization.

61618541275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24423 (or 24418 counting only the distinct ones).

The product of its digits is 403200, while the sum is 46.

The spelling of 61618541275 in words is "sixty-one billion, six hundred eighteen million, five hundred forty-one thousand, two hundred seventy-five".