70797678947 has 4 divisors (see below), whose sum is σ = 70801536120. Its totient is φ = 70793821776.

The previous prime is 70797678943. The next prime is 70797678983. The reversal of 70797678947 is 74987679707.

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

It is a cyclic number.

It is not a de Polignac number, because 70797678947 - 2² = 70797678943 is a prime.

It is a super-2 number, since 2×70797678947² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70797678943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1900922 + ... + 1937807.

It is an arithmetic number, because the mean of its divisors is an integer number (17700384030).

Almost surely, 2^70797678947 is an apocalyptic number.

70797678947 is a deficient number, since it is larger than the sum of its proper divisors (3857173).

70797678947 is a wasteful number, since it uses less digits than its factorization.

70797678947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3857172.

The product of its (nonzero) digits is 261382464, while the sum is 71.

The spelling of 70797678947 in words is "seventy billion, seven hundred ninety-seven million, six hundred seventy-eight thousand, nine hundred forty-seven".