61536187266 has 16 divisors (see below), whose sum is σ = 123128014464. Its totient is φ = 20502789104.

The previous prime is 61536187253. The next prime is 61536187267. The reversal of 61536187266 is 66278163516.

It is not an unprimeable number, because it can be changed into a prime (61536187267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2303946 + ... + 2330501.

It is an arithmetic number, because the mean of its divisors is an integer number (7695500904).

Almost surely, 2^61536187266 is an apocalyptic number.

61536187266 is an abundant number, since it is smaller than the sum of its proper divisors (61591827198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61536187266 is a wasteful number, since it uses less digits than its factorization.

61536187266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4636665.

The product of its digits is 2177280, while the sum is 51.

The spelling of 61536187266 in words is "sixty-one billion, five hundred thirty-six million, one hundred eighty-seven thousand, two hundred sixty-six".