78403753783948 has 24 divisors (see below), whose sum is σ = 139216010208912. Its totient is φ = 38631219907584.

The previous prime is 78403753783921. The next prime is 78403753783963. The reversal of 78403753783948 is 84938735730487.

It is a super-2 number, since 2×78403753783948² (a number of 29 digits) contains 22 as substring.

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, 433539490 + ... + 433720297.

It is an arithmetic number, because the mean of its divisors is an integer number (5800667092038).

Almost surely, 2^{78403753783948} is an apocalyptic number.

It is an amenable number.

78403753783948 is a deficient number, since it is larger than the sum of its proper divisors (60812256424964).

78403753783948 is a wasteful number, since it uses less digits than its factorization.

78403753783948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867260121 (or 867260119 counting only the distinct ones).

The product of its (nonzero) digits is 3413975040, while the sum is 76.

The spelling of 78403753783948 in words is "seventy-eight trillion, four hundred three billion, seven hundred fifty-three million, seven hundred eighty-three thousand, nine hundred forty-eight".