61641288426 has 16 divisors (see below), whose sum is σ = 123353735904. Its totient is φ = 20535236304.

The previous prime is 61641288409. The next prime is 61641288451. The reversal of 61641288426 is 62488214616.

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, 2953696 + ... + 2974491.

It is an arithmetic number, because the mean of its divisors is an integer number (7709608494).

Almost surely, 2^61641288426 is an apocalyptic number.

61641288426 is an abundant number, since it is smaller than the sum of its proper divisors (61712447478).

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

61641288426 is a wasteful number, since it uses less digits than its factorization.

61641288426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5929925.

The product of its digits is 884736, while the sum is 48.

The spelling of 61641288426 in words is "sixty-one billion, six hundred forty-one million, two hundred eighty-eight thousand, four hundred twenty-six".