78151534514 has 8 divisors (see below), whose sum is σ = 117229248540. Its totient is φ = 39075118336.

The previous prime is 78151534441. The next prime is 78151534519. The reversal of 78151534514 is 41543515187.

It can be written as a sum of positive squares in 2 ways, for example, as 68154934225 + 9996600289 = 261065^2 + 99983^2 .

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

It is a super-2 number, since 2×78151534514² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78151534519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156539 + ... + 425214.

Almost surely, 2^78151534514 is an apocalyptic number.

78151534514 is a deficient number, since it is larger than the sum of its proper divisors (39077714026).

78151534514 is a wasteful number, since it uses less digits than its factorization.

78151534514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648924.

The product of its digits is 336000, while the sum is 44.

The spelling of 78151534514 in words is "seventy-eight billion, one hundred fifty-one million, five hundred thirty-four thousand, five hundred fourteen".