772571235561 has 16 divisors (see below), whose sum is σ = 1062857397504. Its totient is φ = 498892230144.

The previous prime is 772571235523. The next prime is 772571235571. The reversal of 772571235561 is 165532175277.

772571235561 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 772571235561 - 2¹⁷ = 772571104489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (772571235571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28229770 + ... + 28257123.

It is an arithmetic number, because the mean of its divisors is an integer number (66428587344).

Almost surely, 2^772571235561 is an apocalyptic number.

It is an amenable number.

772571235561 is a deficient number, since it is larger than the sum of its proper divisors (290286161943).

772571235561 is a wasteful number, since it uses less digits than its factorization.

772571235561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56487040.

The product of its digits is 3087000, while the sum is 51.

The spelling of 772571235561 in words is "seven hundred seventy-two billion, five hundred seventy-one million, two hundred thirty-five thousand, five hundred sixty-one".