42949511057 has 2 divisors, whose sum is σ = 42949511058. Its totient is φ = 42949511056.

The previous prime is 42949511047. The next prime is 42949511113. The reversal of 42949511057 is 75011594924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42948832081 + 678976 = 207241^2 + 824^2 .

It is a cyclic number.

It is not a de Polignac number, because 42949511057 - 2⁴ = 42949511041 is a prime.

It is not a weakly prime, because it can be changed into another prime (42949511047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21474755528 + 21474755529.

It is an arithmetic number, because the mean of its divisors is an integer number (21474755529).

Almost surely, 2^42949511057 is an apocalyptic number.

It is an amenable number.

42949511057 is a deficient number, since it is larger than the sum of its proper divisors (1).

42949511057 is an equidigital number, since it uses as much as digits as its factorization.

42949511057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 47.

The spelling of 42949511057 in words is "forty-two billion, nine hundred forty-nine million, five hundred eleven thousand, fifty-seven".