442155049393 has 2 divisors, whose sum is σ = 442155049394. Its totient is φ = 442155049392.

The previous prime is 442155049351. The next prime is 442155049451. The reversal of 442155049393 is 393940551244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373795286544 + 68359762849 = 611388^2 + 261457^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442155049393 is a prime.

It is not a weakly prime, because it can be changed into another prime (442155049313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221077524696 + 221077524697.

It is an arithmetic number, because the mean of its divisors is an integer number (221077524697).

Almost surely, 2^442155049393 is an apocalyptic number.

It is an amenable number.

442155049393 is a deficient number, since it is larger than the sum of its proper divisors (1).

442155049393 is an equidigital number, since it uses as much as digits as its factorization.

442155049393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 442155049393 in words is "four hundred forty-two billion, one hundred fifty-five million, forty-nine thousand, three hundred ninety-three".