70438780856555 has 4 divisors (see below), whose sum is σ = 84526537027872. Its totient is φ = 56351024685240.

The previous prime is 70438780856513. The next prime is 70438780856567. The reversal of 70438780856555 is 55565808783407.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 70438780856555 - 2⁸ = 70438780856299 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7043878085651 + ... + 7043878085660.

It is an arithmetic number, because the mean of its divisors is an integer number (21131634256968).

Almost surely, 2^{70438780856555} is an apocalyptic number.

70438780856555 is a deficient number, since it is larger than the sum of its proper divisors (14087756171317).

70438780856555 is a wasteful number, since it uses less digits than its factorization.

70438780856555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14087756171316.

The product of its (nonzero) digits is 1128960000, while the sum is 71.

The spelling of 70438780856555 in words is "seventy trillion, four hundred thirty-eight billion, seven hundred eighty million, eight hundred fifty-six thousand, five hundred fifty-five".