1107557681 has 2 divisors, whose sum is σ = 1107557682. Its totient is φ = 1107557680.

The previous prime is 1107557657. The next prime is 1107557683. The reversal of 1107557681 is 1867557011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 953574400 + 153983281 = 30880^2 + 12409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1107557681 is a prime.

It is a super-2 number, since 2×1107557681² = 2453368033484195522, which contains 22 as substring.

Together with 1107557683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1107557683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 553778840 + 553778841.

It is an arithmetic number, because the mean of its divisors is an integer number (553778841).

Almost surely, 2^1107557681 is an apocalyptic number.

It is an amenable number.

1107557681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1107557681 is an equidigital number, since it uses as much as digits as its factorization.

1107557681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58800, while the sum is 41.

The square root of 1107557681 is about 33279.9891977146. The cubic root of 1107557681 is about 1034.6388561625.

The spelling of 1107557681 in words is "one billion, one hundred seven million, five hundred fifty-seven thousand, six hundred eighty-one".