57504178649 has 2 divisors, whose sum is σ = 57504178650. Its totient is φ = 57504178648.

The previous prime is 57504178643. The next prime is 57504178651. The reversal of 57504178649 is 94687140575.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29089008025 + 28415170624 = 170555^2 + 168568^2 .

It is a cyclic number.

It is not a de Polignac number, because 57504178649 - 2²⁰ = 57503130073 is a prime.

It is a super-2 number, since 2×57504178649² (a number of 22 digits) contains 22 as substring.

Together with 57504178651, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 57504178594 and 57504178603.

It is not a weakly prime, because it can be changed into another prime (57504178643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28752089324 + 28752089325.

It is an arithmetic number, because the mean of its divisors is an integer number (28752089325).

Almost surely, 2^57504178649 is an apocalyptic number.

It is an amenable number.

57504178649 is a deficient number, since it is larger than the sum of its proper divisors (1).

57504178649 is an equidigital number, since it uses as much as digits as its factorization.

57504178649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8467200, while the sum is 56.

The spelling of 57504178649 in words is "fifty-seven billion, five hundred four million, one hundred seventy-eight thousand, six hundred forty-nine".