78189069075 has 24 divisors (see below), whose sum is σ = 139216641648. Its totient is φ = 38493079680.

The previous prime is 78189069061. The next prime is 78189069103. The reversal of 78189069075 is 57096098187.

It is not a de Polignac number, because 78189069075 - 2¹⁵ = 78189036307 is a prime.

It is a super-2 number, since 2×78189069075² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40095984 + ... + 40097933.

It is an arithmetic number, because the mean of its divisors is an integer number (5800693402).

Almost surely, 2^78189069075 is an apocalyptic number.

78189069075 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78189069075 is a deficient number, since it is larger than the sum of its proper divisors (61027572573).

78189069075 is a wasteful number, since it uses less digits than its factorization.

78189069075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80193943 (or 80193938 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 60.

The spelling of 78189069075 in words is "seventy-eight billion, one hundred eighty-nine million, sixty-nine thousand, seventy-five".