70985916781 has 8 divisors (see below), whose sum is σ = 77160825504. Its totient is φ = 64913072880.

The previous prime is 70985916779. The next prime is 70985916803. The reversal of 70985916781 is 18761958907.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 70985916781 - 2¹ = 70985916779 is a prime.

It is a super-2 number, since 2×70985916781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70985916181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25514755 + ... + 25517536.

It is an arithmetic number, because the mean of its divisors is an integer number (9645103188).

Almost surely, 2^70985916781 is an apocalyptic number.

It is an amenable number.

70985916781 is a deficient number, since it is larger than the sum of its proper divisors (6174908723).

70985916781 is a wasteful number, since it uses less digits than its factorization.

70985916781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51032411.

The product of its (nonzero) digits is 7620480, while the sum is 61.

The spelling of 70985916781 in words is "seventy billion, nine hundred eighty-five million, nine hundred sixteen thousand, seven hundred eighty-one".