70887721439 has 8 divisors (see below), whose sum is σ = 75961897200. Its totient is φ = 65914024576.

The previous prime is 70887721403. The next prime is 70887721453. The reversal of 70887721439 is 93412778807.

It is a happy number.

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 70887721439 - 2⁸ = 70887721183 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 (70887721469) 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, 25118264 + ... + 25121085.

It is an arithmetic number, because the mean of its divisors is an integer number (9495237150).

Almost surely, 2^70887721439 is an apocalyptic number.

70887721439 is a deficient number, since it is larger than the sum of its proper divisors (5074175761).

70887721439 is a wasteful number, since it uses less digits than its factorization.

70887721439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50239449.

The product of its (nonzero) digits is 4741632, while the sum is 56.

The spelling of 70887721439 in words is "seventy billion, eight hundred eighty-seven million, seven hundred twenty-one thousand, four hundred thirty-nine".