61541531442227 has 4 divisors (see below), whose sum is σ = 61541624609040. Its totient is φ = 61541438275416.

The previous prime is 61541531442137. The next prime is 61541531442253. The reversal of 61541531442227 is 72224413514516.

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

It is a cyclic number.

It is not a de Polignac number, because 61541531442227 - 2²² = 61541527247923 is a prime.

It is a super-2 number, since 2×61541531442227² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61541531442527) 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, 45585452 + ... + 46916057.

It is an arithmetic number, because the mean of its divisors is an integer number (15385406152260).

Almost surely, 2^{61541531442227} is an apocalyptic number.

61541531442227 is a deficient number, since it is larger than the sum of its proper divisors (93166813).

61541531442227 is an equidigital number, since it uses as much as digits as its factorization.

61541531442227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93166812.

The product of its digits is 1612800, while the sum is 47.

The spelling of 61541531442227 in words is "sixty-one trillion, five hundred forty-one billion, five hundred thirty-one million, four hundred forty-two thousand, two hundred twenty-seven".