70641973981 has 8 divisors (see below), whose sum is σ = 72888762240. Its totient is φ = 68426176128.

The previous prime is 70641973931. The next prime is 70641973999. The reversal of 70641973981 is 18937914607.

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 70641973981 - 2¹⁵ = 70641941213 is a prime.

It is a super-2 number, since 2×70641973981² (a number of 22 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 (70641973931) 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, 7742971 + ... + 7752088.

It is an arithmetic number, because the mean of its divisors is an integer number (9111095280).

Almost surely, 2^70641973981 is an apocalyptic number.

It is an amenable number.

70641973981 is a deficient number, since it is larger than the sum of its proper divisors (2246788259).

70641973981 is a wasteful number, since it uses less digits than its factorization.

70641973981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15495203.

The product of its (nonzero) digits is 2286144, while the sum is 55.

It can be divided in two parts, 7064 and 1973981, that added together give a triangular number (1981045 = T₁₉₉₀).

The spelling of 70641973981 in words is "seventy billion, six hundred forty-one million, nine hundred seventy-three thousand, nine hundred eighty-one".