78215430693 has 16 divisors (see below), whose sum is σ = 107922870720. Its totient is φ = 50327122944.

The previous prime is 78215430673. The next prime is 78215430701. The reversal of 78215430693 is 39603451287.

It is a de Polignac number, because none of the positive numbers 2^k-78215430693 is a prime.

It is a super-2 number, since 2×78215430693² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78215430673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76230 + ... + 402792.

It is an arithmetic number, because the mean of its divisors is an integer number (6745179420).

It is a 1-persistent number, because it is pandigital, but 2⋅78215430693 = 156430861386 is not.

Almost surely, 2^78215430693 is an apocalyptic number.

It is an amenable number.

78215430693 is a deficient number, since it is larger than the sum of its proper divisors (29707440027).

78215430693 is a wasteful number, since it uses less digits than its factorization.

78215430693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329348.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 78215430693 in words is "seventy-eight billion, two hundred fifteen million, four hundred thirty thousand, six hundred ninety-three".