78401730364 has 24 divisors (see below), whose sum is σ = 146631507120. Its totient is φ = 36550116096.

The previous prime is 78401730361. The next prime is 78401730367. The reversal of 78401730364 is 46303710487.

It is an interprime number because it is at equal distance from previous prime (78401730361) and next prime (78401730367).

It is a super-2 number, since 2×78401730364² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78401730364.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78401730361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5380419 + ... + 5394970.

It is an arithmetic number, because the mean of its divisors is an integer number (6109646130).

Almost surely, 2^78401730364 is an apocalyptic number.

It is an amenable number.

78401730364 is a deficient number, since it is larger than the sum of its proper divisors (68229776756).

78401730364 is a wasteful number, since it uses less digits than its factorization.

78401730364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10775517 (or 10775515 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 78401730364 in words is "seventy-eight billion, four hundred one million, seven hundred thirty thousand, three hundred sixty-four".