70568728531 has 4 divisors (see below), whose sum is σ = 80649975472. Its totient is φ = 60487481592.

The previous prime is 70568728519. The next prime is 70568728597. The reversal of 70568728531 is 13582786507.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13582786507 = 3119 ⋅4354853.

It is a cyclic number.

It is not a de Polignac number, because 70568728531 - 2⁷ = 70568728403 is a prime.

It is a super-2 number, since 2×70568728531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70568728031) 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, 5040623460 + ... + 5040623473.

It is an arithmetic number, because the mean of its divisors is an integer number (20162493868).

Almost surely, 2^70568728531 is an apocalyptic number.

70568728531 is a deficient number, since it is larger than the sum of its proper divisors (10081246941).

70568728531 is a wasteful number, since it uses less digits than its factorization.

70568728531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10081246940.

The product of its (nonzero) digits is 2822400, while the sum is 52.

The spelling of 70568728531 in words is "seventy billion, five hundred sixty-eight million, seven hundred twenty-eight thousand, five hundred thirty-one".