772081881 has 8 divisors (see below), whose sum is σ = 1032393600. Its totient is φ = 513245712.

The previous prime is 772081841. The next prime is 772081889. The reversal of 772081881 is 188180277.

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

It is a de Polignac number, because none of the positive numbers 2^k-772081881 is a prime.

It is a super-2 number, since 2×772081881² = 1192220861936996322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (772081889) 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, 367665 + ... + 369758.

It is an arithmetic number, because the mean of its divisors is an integer number (129049200).

Almost surely, 2^772081881 is an apocalyptic number.

It is an amenable number.

772081881 is a deficient number, since it is larger than the sum of its proper divisors (260311719).

772081881 is a wasteful number, since it uses less digits than its factorization.

772081881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737775.

The product of its (nonzero) digits is 50176, while the sum is 42.

The square root of 772081881 is about 27786.3614206682. The cubic root of 772081881 is about 917.3909542809.

The spelling of 772081881 in words is "seven hundred seventy-two million, eighty-one thousand, eight hundred eighty-one".