78134530223402 has 32 divisors (see below), whose sum is σ = 122983314353280. Its totient is φ = 37159150501440.

The previous prime is 78134530223401. The next prime is 78134530223479. The reversal of 78134530223402 is 20432203543187.

It is a super-2 number, since 2×78134530223402² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78134530223401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 675303068 + ... + 675418760.

It is an arithmetic number, because the mean of its divisors is an integer number (3843228573540).

Almost surely, 2^{78134530223402} is an apocalyptic number.

78134530223402 is a deficient number, since it is larger than the sum of its proper divisors (44848784129878).

78134530223402 is a wasteful number, since it uses less digits than its factorization.

78134530223402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197918.

The product of its (nonzero) digits is 967680, while the sum is 44.

Adding to 78134530223402 its reverse (20432203543187), we get a palindrome (98566733766589).

The spelling of 78134530223402 in words is "seventy-eight trillion, one hundred thirty-four billion, five hundred thirty million, two hundred twenty-three thousand, four hundred two".