78658901040 has 160 divisors (see below), whose sum is σ = 257026763520. Its totient is φ = 19844600832.

The previous prime is 78658901017. The next prime is 78658901047. The reversal of 78658901040 is 4010985687.

It is a super-3 number, since 3×78658901040³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (78658901047) 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, 3440527 + ... + 3463313.

It is an arithmetic number, because the mean of its divisors is an integer number (1606417272).

Almost surely, 2^78658901040 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 78658901040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128513381760).

78658901040 is an abundant number, since it is smaller than the sum of its proper divisors (178367862480).

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

78658901040 is a wasteful number, since it uses less digits than its factorization.

78658901040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23579 (or 23573 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 48.

The spelling of 78658901040 in words is "seventy-eight billion, six hundred fifty-eight million, nine hundred one thousand, forty".