78951415987 has 8 divisors (see below), whose sum is σ = 80295018480. Its totient is φ = 77607995040.

The previous prime is 78951415979. The next prime is 78951415999.

78951415987 is nontrivially palindromic in base 10.

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 78951415987 - 2³ = 78951415979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78951415087) 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 7 ways as a sum of consecutive naturals, for example, 1057833 + ... + 1130005.

It is an arithmetic number, because the mean of its divisors is an integer number (10036877310).

Almost surely, 2^78951415987 is an apocalyptic number.

78951415987 is a deficient number, since it is larger than the sum of its proper divisors (1343602493).

78951415987 is a wasteful number, since it uses less digits than its factorization.

78951415987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90773.

The product of its digits is 25401600, while the sum is 64.

The spelling of 78951415987 in words is "seventy-eight billion, nine hundred fifty-one million, four hundred fifteen thousand, nine hundred eighty-seven".