70781474691 has 6 divisors (see below), whose sum is σ = 102239907900. Its totient is φ = 47187649788.

The previous prime is 70781474641. The next prime is 70781474717. The reversal of 70781474691 is 19647418707.

It is a happy number.

70781474691 is a `hidden beast` number, since 7 + 0 + 7 + 81 + 474 + 6 + 91 = 666.

It is not a de Polignac number, because 70781474691 - 2⁶ = 70781474627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70781474641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3932304141 + ... + 3932304158.

It is an arithmetic number, because the mean of its divisors is an integer number (17039984650).

Almost surely, 2^70781474691 is an apocalyptic number.

70781474691 is a deficient number, since it is larger than the sum of its proper divisors (31458433209).

70781474691 is a wasteful number, since it uses less digits than its factorization.

70781474691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7864608305 (or 7864608302 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 54.

The spelling of 70781474691 in words is "seventy billion, seven hundred eighty-one million, four hundred seventy-four thousand, six hundred ninety-one".