57641557 has 2 divisors, whose sum is σ = 57641558. Its totient is φ = 57641556.

The previous prime is 57641537. The next prime is 57641567. The reversal of 57641557 is 75514675.

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., 32330596 + 25310961 = 5686^2 + 5031^2 .

It is a cyclic number.

It is not a de Polignac number, because 57641557 - 2²³ = 49252949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57641537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28820778 + 28820779.

It is an arithmetic number, because the mean of its divisors is an integer number (28820779).

Almost surely, 2^57641557 is an apocalyptic number.

It is an amenable number.

57641557 is a deficient number, since it is larger than the sum of its proper divisors (1).

57641557 is an equidigital number, since it uses as much as digits as its factorization.

57641557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 147000, while the sum is 40.

The square root of 57641557 is about 7592.2036985318. The cubic root of 57641557 is about 386.2886084649.

The spelling of 57641557 in words is "fifty-seven million, six hundred forty-one thousand, five hundred fifty-seven".