78947274987 has 24 divisors (see below), whose sum is σ = 130458342144. Its totient is φ = 45066800304.

The previous prime is 78947274971. The next prime is 78947274997.

78947274987 is a `hidden beast` number, since 7 + 8 + 9 + 472 + 74 + 9 + 87 = 666.

78947274987 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78947274987 - 2⁴ = 78947274971 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (78947274907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 575473 + ... + 699330.

It is an arithmetic number, because the mean of its divisors is an integer number (5435764256).

Almost surely, 2^78947274987 is an apocalyptic number.

78947274987 is a deficient number, since it is larger than the sum of its proper divisors (51511067157).

78947274987 is a wasteful number, since it uses less digits than its factorization.

78947274987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275799 (or 1275796 counting only the distinct ones).

The product of its digits is 398297088, while the sum is 72.

The spelling of 78947274987 in words is "seventy-eight billion, nine hundred forty-seven million, two hundred seventy-four thousand, nine hundred eighty-seven".