772080561 has 24 divisors (see below), whose sum is σ = 1341629120. Its totient is φ = 417967776.

The previous prime is 772080559. The next prime is 772080563. The reversal of 772080561 is 165080277.

772080561 is a `hidden beast` number, since 77 + 20 + 8 + 0 + 561 = 666.

It is an interprime number because it is at equal distance from previous prime (772080559) and next prime (772080563).

It is not a de Polignac number, because 772080561 - 2¹ = 772080559 is a prime.

It is a super-2 number, since 2×772080561² = 1192216785348149442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (772080563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 321310 + ... + 323703.

Almost surely, 2^772080561 is an apocalyptic number.

It is an amenable number.

772080561 is a deficient number, since it is larger than the sum of its proper divisors (569548559).

772080561 is a wasteful number, since it uses less digits than its factorization.

772080561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645045 (or 645042 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 772080561 is about 27786.3376679979. The cubic root of 772080561 is about 917.3904314708.

It can be divided in two parts, 772080 and 561, that added together give a square (772641 = 879²).

The spelling of 772080561 in words is "seven hundred seventy-two million, eighty thousand, five hundred sixty-one".