78347438774 has 24 divisors (see below), whose sum is σ = 129327222024. Its totient is φ = 35570823200.

The previous prime is 78347438761. The next prime is 78347438779. The reversal of 78347438774 is 47783474387.

It is a super-2 number, since 2×78347438774² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78347438779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18509 + ... + 396279.

It is an arithmetic number, because the mean of its divisors is an integer number (5388634251).

Almost surely, 2^78347438774 is an apocalyptic number.

78347438774 is a deficient number, since it is larger than the sum of its proper divisors (50979783250).

78347438774 is a wasteful number, since it uses less digits than its factorization.

78347438774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378652 (or 378641 counting only the distinct ones).

The product of its digits is 88510464, while the sum is 62.

The spelling of 78347438774 in words is "seventy-eight billion, three hundred forty-seven million, four hundred thirty-eight thousand, seven hundred seventy-four".