2921949842057 has 4 divisors (see below), whose sum is σ = 2921979456000. Its totient is φ = 2921920228116.

The previous prime is 2921949842039. The next prime is 2921949842059. The reversal of 2921949842057 is 7502489491292.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2921949842057 - 2¹⁶ = 2921949776521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2921949842059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14658473 + ... + 14856470.

It is an arithmetic number, because the mean of its divisors is an integer number (730494864000).

Almost surely, 2^{2921949842057} is an apocalyptic number.

It is an amenable number.

2921949842057 is a deficient number, since it is larger than the sum of its proper divisors (29613943).

2921949842057 is an equidigital number, since it uses as much as digits as its factorization.

2921949842057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29613942.

The product of its (nonzero) digits is 26127360, while the sum is 62.

The spelling of 2921949842057 in words is "two trillion, nine hundred twenty-one billion, nine hundred forty-nine million, eight hundred forty-two thousand, fifty-seven".