70781667651 has 24 divisors (see below), whose sum is σ = 107641170000. Its totient is φ = 44695936512.

The previous prime is 70781667629. The next prime is 70781667659. The reversal of 70781667651 is 15676618707.

It is not a de Polignac number, because 70781667651 - 2⁶ = 70781667587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70781667659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 964795 + ... + 1035563.

It is an arithmetic number, because the mean of its divisors is an integer number (4485048750).

Almost surely, 2^70781667651 is an apocalyptic number.

70781667651 is a deficient number, since it is larger than the sum of its proper divisors (36859502349).

70781667651 is a wasteful number, since it uses less digits than its factorization.

70781667651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76643 (or 76640 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 54.

The spelling of 70781667651 in words is "seventy billion, seven hundred eighty-one million, six hundred sixty-seven thousand, six hundred fifty-one".