78472338784669 has 8 divisors (see below), whose sum is σ = 78610629600000. Its totient is φ = 78334072254672.

The previous prime is 78472338784663. The next prime is 78472338784703. The reversal of 78472338784669 is 96648783327487.

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 78472338784669 - 2¹⁵ = 78472338751901 is a prime.

It is a super-2 number, since 2×78472338784669² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78472338784592 and 78472338784601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78472338784663) 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, 402967 + ... + 12534235.

It is an arithmetic number, because the mean of its divisors is an integer number (9826328700000).

Almost surely, 2^{78472338784669} is an apocalyptic number.

It is an amenable number.

78472338784669 is a deficient number, since it is larger than the sum of its proper divisors (138290815331).

78472338784669 is a wasteful number, since it uses less digits than its factorization.

78472338784669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12142667.

The product of its digits is 16387080192, while the sum is 82.

The spelling of 78472338784669 in words is "seventy-eight trillion, four hundred seventy-two billion, three hundred thirty-eight million, seven hundred eighty-four thousand, six hundred sixty-nine".