78477477487 has 8 divisors (see below), whose sum is σ = 78804209232. Its totient is φ = 78151286400.

The previous prime is 78477477479. The next prime is 78477477493.

78477477487 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 78477477487 - 2³ = 78477477479 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 (78477477437) 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, 157053 + ... + 426169.

It is an arithmetic number, because the mean of its divisors is an integer number (9850526154).

Almost surely, 2^78477477487 is an apocalyptic number.

78477477487 is a deficient number, since it is larger than the sum of its proper divisors (326731745).

78477477487 is a wasteful number, since it uses less digits than its factorization.

78477477487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270329.

The product of its digits is 481890304, while the sum is 70.

The spelling of 78477477487 in words is "seventy-eight billion, four hundred seventy-seven million, four hundred seventy-seven thousand, four hundred eighty-seven".