78321153 has 8 divisors (see below), whose sum is σ = 105750400. Its totient is φ = 51553008.

The previous prime is 78321151. The next prime is 78321161. The reversal of 78321153 is 35112387.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78321153 - 2¹ = 78321151 is a prime.

It is a super-2 number, since 2×78321153² = 12268406014498818, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78321153.

It is not an unprimeable number, because it can be changed into a prime (78321151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164998 + ... + 165471.

It is an arithmetic number, because the mean of its divisors is an integer number (13218800).

Almost surely, 2^78321153 is an apocalyptic number.

It is an amenable number.

78321153 is a deficient number, since it is larger than the sum of its proper divisors (27429247).

78321153 is a wasteful number, since it uses less digits than its factorization.

78321153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330551.

The product of its digits is 5040, while the sum is 30.

The square root of 78321153 is about 8849.9238979779. The cubic root of 78321153 is about 427.8514656941.

It can be divided in two parts, 7 and 8321153, that added together give a triangular number (8321160 = T₄₀₇₉).

The spelling of 78321153 in words is "seventy-eight million, three hundred twenty-one thousand, one hundred fifty-three".