77851482981940 has 48 divisors (see below), whose sum is σ = 164346572565504. Its totient is φ = 30977082288000.

The previous prime is 77851482981913. The next prime is 77851482981953. The reversal of 77851482981940 is 4918928415877.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 361459162 + ... + 361674478.

It is an arithmetic number, because the mean of its divisors is an integer number (3423886928448).

Almost surely, 2^{77851482981940} is an apocalyptic number.

It is an amenable number.

77851482981940 is an abundant number, since it is smaller than the sum of its proper divisors (86495089583564).

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

77851482981940 is a wasteful number, since it uses less digits than its factorization.

77851482981940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310168 (or 310166 counting only the distinct ones).

The product of its (nonzero) digits is 325140480, while the sum is 73.

The spelling of 77851482981940 in words is "seventy-seven trillion, eight hundred fifty-one billion, four hundred eighty-two million, nine hundred eighty-one thousand, nine hundred forty".