61127881894 has 4 divisors (see below), whose sum is σ = 91691822844. Its totient is φ = 30563940946.

The previous prime is 61127881889. The next prime is 61127881957. The reversal of 61127881894 is 49818872116.

61127881894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15281970472 + ... + 15281970475.

It is an arithmetic number, because the mean of its divisors is an integer number (22922955711).

Almost surely, 2^61127881894 is an apocalyptic number.

61127881894 is a deficient number, since it is larger than the sum of its proper divisors (30563940950).

61127881894 is a wasteful number, since it uses less digits than its factorization.

61127881894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30563940949.

The product of its digits is 1548288, while the sum is 55.

The spelling of 61127881894 in words is "sixty-one billion, one hundred twenty-seven million, eight hundred eighty-one thousand, eight hundred ninety-four".