70881563 has 4 divisors (see below), whose sum is σ = 71071968. Its totient is φ = 70691160.

The previous prime is 70881541. The next prime is 70881581. The reversal of 70881563 is 36518807.

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

It is a cyclic number.

It is not a de Polignac number, because 70881563 - 2²² = 66687259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70881523) 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, 94643 + ... + 95388.

It is an arithmetic number, because the mean of its divisors is an integer number (17767992).

Almost surely, 2^70881563 is an apocalyptic number.

70881563 is a deficient number, since it is larger than the sum of its proper divisors (190405).

70881563 is a wasteful number, since it uses less digits than its factorization.

70881563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190404.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 70881563 is about 8419.1188968918. The cubic root of 70881563 is about 413.8513998332.

The spelling of 70881563 in words is "seventy million, eight hundred eighty-one thousand, five hundred sixty-three".