61571383896 has 64 divisors (see below), whose sum is σ = 167944233600. Its totient is φ = 18655520000.

The previous prime is 61571383879. The next prime is 61571383903. The reversal of 61571383896 is 69838317516.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3423295 + ... + 3441233.

It is an arithmetic number, because the mean of its divisors is an integer number (2624128650).

Almost surely, 2^61571383896 is an apocalyptic number.

61571383896 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

61571383896 is an abundant number, since it is smaller than the sum of its proper divisors (106372849704).

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

61571383896 is a wasteful number, since it uses less digits than its factorization.

61571383896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30960 (or 30956 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 57.

The spelling of 61571383896 in words is "sixty-one billion, five hundred seventy-one million, three hundred eighty-three thousand, eight hundred ninety-six".