78738949087 has 8 divisors (see below), whose sum is σ = 82353024000. Its totient is φ = 75140761080.

The previous prime is 78738949073. The next prime is 78738949111. The reversal of 78738949087 is 78094983787.

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 78738949087 - 2³¹ = 76591465439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78738949187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3961587 + ... + 3981412.

It is an arithmetic number, because the mean of its divisors is an integer number (10294128000).

Almost surely, 2^78738949087 is an apocalyptic number.

78738949087 is a deficient number, since it is larger than the sum of its proper divisors (3614074913).

78738949087 is a wasteful number, since it uses less digits than its factorization.

78738949087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7943453.

The product of its (nonzero) digits is 170698752, while the sum is 70.

The spelling of 78738949087 in words is "seventy-eight billion, seven hundred thirty-eight million, nine hundred forty-nine thousand, eighty-seven".