78149162405 has 8 divisors (see below), whose sum is σ = 93842755584. Its totient is φ = 62476822800.

The previous prime is 78149162389. The next prime is 78149162407. The reversal of 78149162405 is 50426194187.

It is a happy number.

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

It is not a de Polignac number, because 78149162405 - 2⁴ = 78149162389 is a prime.

It is a super-2 number, since 2×78149162405² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78149162405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78149162407) 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, 5305301 + ... + 5320010.

It is an arithmetic number, because the mean of its divisors is an integer number (11730344448).

Almost surely, 2^78149162405 is an apocalyptic number.

It is an amenable number.

78149162405 is a deficient number, since it is larger than the sum of its proper divisors (15693593179).

78149162405 is a wasteful number, since it uses less digits than its factorization.

78149162405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10626787.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 78149162405 in words is "seventy-eight billion, one hundred forty-nine million, one hundred sixty-two thousand, four hundred five".