781001010113 has 4 divisors (see below), whose sum is σ = 826942246020. Its totient is φ = 735059774208.

The previous prime is 781001010109. The next prime is 781001010121. The reversal of 781001010113 is 311010100187.

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

It can be written as a sum of positive squares in 2 ways, for example, as 594983907904 + 186017102209 = 771352^2 + 431297^2 .

It is a cyclic number.

It is not a de Polignac number, because 781001010113 - 2² = 781001010109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (781001010103) 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, 22970617928 + ... + 22970617961.

It is an arithmetic number, because the mean of its divisors is an integer number (206735561505).

Almost surely, 2^781001010113 is an apocalyptic number.

It is an amenable number.

781001010113 is a deficient number, since it is larger than the sum of its proper divisors (45941235907).

781001010113 is a wasteful number, since it uses less digits than its factorization.

781001010113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45941235906.

The product of its (nonzero) digits is 168, while the sum is 23.

The spelling of 781001010113 in words is "seven hundred eighty-one billion, one million, ten thousand, one hundred thirteen".