3755557021 has 2 divisors, whose sum is σ = 3755557022. Its totient is φ = 3755557020.

The previous prime is 3755557009. The next prime is 3755557027. The reversal of 3755557021 is 1207555573.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3106836121 + 648720900 = 55739^2 + 25470^2 .

It is a cyclic number.

It is not a de Polignac number, because 3755557021 - 2⁹ = 3755556509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3755557027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1877778510 + 1877778511.

It is an arithmetic number, because the mean of its divisors is an integer number (1877778511).

Almost surely, 2^3755557021 is an apocalyptic number.

It is an amenable number.

3755557021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3755557021 is an equidigital number, since it uses as much as digits as its factorization.

3755557021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183750, while the sum is 40.

The square root of 3755557021 is about 61282.5996592834. The cubic root of 3755557021 is about 1554.3832944952.

The spelling of 3755557021 in words is "three billion, seven hundred fifty-five million, five hundred fifty-seven thousand, twenty-one".