78345572740 has 96 divisors (see below), whose sum is σ = 171848033280. Its totient is φ = 29968704000.

The previous prime is 78345572719. The next prime is 78345572813. The reversal of 78345572740 is 4727554387.

It is a super-2 number, since 2×78345572740² (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 31 ways as a sum of consecutive naturals, for example, 46275334 + ... + 46277026.

It is an arithmetic number, because the mean of its divisors is an integer number (1790083680).

Almost surely, 2^78345572740 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 78345572740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85924016640).

78345572740 is an abundant number, since it is smaller than the sum of its proper divisors (93502460540).

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

78345572740 is a wasteful number, since it uses less digits than its factorization.

78345572740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2573 (or 2571 counting only the distinct ones).

The product of its (nonzero) digits is 6585600, while the sum is 52.

The spelling of 78345572740 in words is "seventy-eight billion, three hundred forty-five million, five hundred seventy-two thousand, seven hundred forty".