78181085745433 has 32 divisors (see below), whose sum is σ = 85525897524480. Its totient is φ = 70876226165760.

The previous prime is 78181085745421. The next prime is 78181085745437. The reversal of 78181085745433 is 33454758018187.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 78181085745433 - 2³³ = 78172495810841 is a prime.

It is a super-2 number, since 2×78181085745433² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

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 31 ways as a sum of consecutive naturals, for example, 28153072341 + ... + 28153075117.

It is an arithmetic number, because the mean of its divisors is an integer number (2672684297640).

Almost surely, 2^{78181085745433} is an apocalyptic number.

It is an amenable number.

78181085745433 is a deficient number, since it is larger than the sum of its proper divisors (7344811779047).

78181085745433 is a wasteful number, since it uses less digits than its factorization.

78181085745433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7377.

The product of its (nonzero) digits is 90316800, while the sum is 64.

The spelling of 78181085745433 in words is "seventy-eight trillion, one hundred eighty-one billion, eighty-five million, seven hundred forty-five thousand, four hundred thirty-three".