78369441540 has 192 divisors, whose sum is σ = 238397402880. Its totient is φ = 19121633280.

The previous prime is 78369441467. The next prime is 78369441541. The reversal of 78369441540 is 4514496387.

It is a happy number.

It is a super-2 number, since 2×78369441540² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78369441541) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54918307 + ... + 54919733.

It is an arithmetic number, because the mean of its divisors is an integer number (1241653140).

Almost surely, 2^78369441540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78369441540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119198701440).

78369441540 is an abundant number, since it is smaller than the sum of its proper divisors (160027961340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78369441540 is a wasteful number, since it uses less digits than its factorization.

78369441540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2022 (or 2020 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 78369441540 in words is "seventy-eight billion, three hundred sixty-nine million, four hundred forty-one thousand, five hundred forty".