78253653 has 8 divisors (see below), whose sum is σ = 104582016. Its totient is φ = 52047200.

The previous prime is 78253633. The next prime is 78253663. The reversal of 78253653 is 35635287.

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

It is a cyclic number.

It is not a de Polignac number, because 78253653 - 2⁵ = 78253621 is a prime.

It is a super-2 number, since 2×78253653² = 12247268415688818, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78253603) 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, 28968 + ... + 31553.

It is an arithmetic number, because the mean of its divisors is an integer number (13072752).

Almost surely, 2^78253653 is an apocalyptic number.

It is an amenable number.

78253653 is a deficient number, since it is larger than the sum of its proper divisors (26328363).

78253653 is a wasteful number, since it uses less digits than its factorization.

78253653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60955.

The product of its digits is 151200, while the sum is 39.

The square root of 78253653 is about 8846.1094838353. The cubic root of 78253653 is about 427.7285177487.

The spelling of 78253653 in words is "seventy-eight million, two hundred fifty-three thousand, six hundred fifty-three".