78181085745434 has 8 divisors (see below), whose sum is σ = 134024718420768. Its totient is φ = 33506179605180.

The previous prime is 78181085745421. The next prime is 78181085745437. The reversal of 78181085745434 is 43454758018187.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78181085745434² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78181085745437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2792181633752 + ... + 2792181633779.

It is an arithmetic number, because the mean of its divisors is an integer number (16753089802596).

Almost surely, 2^{78181085745434} is an apocalyptic number.

78181085745434 is a deficient number, since it is larger than the sum of its proper divisors (55843632675334).

78181085745434 is a wasteful number, since it uses less digits than its factorization.

78181085745434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5584363267540.

The product of its (nonzero) digits is 120422400, while the sum is 65.

The spelling of 78181085745434 in words is "seventy-eight trillion, one hundred eighty-one billion, eighty-five million, seven hundred forty-five thousand, four hundred thirty-four".