57781243488 has 48 divisors (see below), whose sum is σ = 156905970480. Its totient is φ = 18596261376.

The previous prime is 57781243469. The next prime is 57781243493. The reversal of 57781243488 is 88434218775.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×57781243488² (a number of 22 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 10374595 + ... + 10380162.

It is an arithmetic number, because the mean of its divisors is an integer number (3268874385).

Almost surely, 2^57781243488 is an apocalyptic number.

57781243488 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

57781243488 is an abundant number, since it is smaller than the sum of its proper divisors (99124726992).

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

57781243488 is a wasteful number, since it uses less digits than its factorization.

57781243488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20754799 (or 20754791 counting only the distinct ones).

The product of its digits is 12042240, while the sum is 57.

The spelling of 57781243488 in words is "fifty-seven billion, seven hundred eighty-one million, two hundred forty-three thousand, four hundred eighty-eight".