1077724561 has 2 divisors, whose sum is σ = 1077724562. Its totient is φ = 1077724560.

The previous prime is 1077724553. The next prime is 1077724577. The reversal of 1077724561 is 1654277701.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 999508225 + 78216336 = 31615^2 + 8844^2 .

It is a cyclic number.

It is not a de Polignac number, because 1077724561 - 2³ = 1077724553 is a prime.

It is a super-2 number, since 2×1077724561² = 2322980458765285442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1077724511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538862280 + 538862281.

It is an arithmetic number, because the mean of its divisors is an integer number (538862281).

Almost surely, 2^1077724561 is an apocalyptic number.

It is an amenable number.

1077724561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1077724561 is an equidigital number, since it uses as much as digits as its factorization.

1077724561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82320, while the sum is 40.

The square root of 1077724561 is about 32828.7154942133. The cubic root of 1077724561 is about 1025.2645158288.

The spelling of 1077724561 in words is "one billion, seventy-seven million, seven hundred twenty-four thousand, five hundred sixty-one".