78437273487 has 8 divisors (see below), whose sum is σ = 104606171904. Its totient is φ = 52279945368.

The previous prime is 78437273479. The next prime is 78437273513.

78437273487 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 78437273487 - 2³ = 78437273479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78437273487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78437273587) 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, 2876743 + ... + 2903880.

It is an arithmetic number, because the mean of its divisors is an integer number (13075771488).

Almost surely, 2^78437273487 is an apocalyptic number.

78437273487 is a deficient number, since it is larger than the sum of its proper divisors (26168898417).

78437273487 is a wasteful number, since it uses less digits than its factorization.

78437273487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5785149.

The product of its digits is 44255232, while the sum is 60.

The spelling of 78437273487 in words is "seventy-eight billion, four hundred thirty-seven million, two hundred seventy-three thousand, four hundred eighty-seven".