78258259632 has 160 divisors (see below), whose sum is σ = 234139299840. Its totient is φ = 22061445120.

The previous prime is 78258259627. The next prime is 78258259637. The reversal of 78258259632 is 23695285287.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78258259627) and next prime (78258259637).

It is a super-2 number, since 2×78258259632² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78258259637) 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, 15577473 + ... + 15582495.

It is an arithmetic number, because the mean of its divisors is an integer number (1463370624).

Almost surely, 2^78258259632 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 78258259632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117069649920).

78258259632 is an abundant number, since it is smaller than the sum of its proper divisors (155881040208).

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

78258259632 is a wasteful number, since it uses less digits than its factorization.

78258259632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5651 (or 5645 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 57.

The spelling of 78258259632 in words is "seventy-eight billion, two hundred fifty-eight million, two hundred fifty-nine thousand, six hundred thirty-two".