1655616031819 has 2 divisors, whose sum is σ = 1655616031820. Its totient is φ = 1655616031818.

The previous prime is 1655616031793. The next prime is 1655616031829. The reversal of 1655616031819 is 9181306165561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1655616031819 - 2⁵ = 1655616031787 is a prime.

It is a super-2 number, since 2×1655616031819² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1655616031829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827808015909 + 827808015910.

It is an arithmetic number, because the mean of its divisors is an integer number (827808015910).

Almost surely, 2^{1655616031819} is an apocalyptic number.

1655616031819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655616031819 is an equidigital number, since it uses as much as digits as its factorization.

1655616031819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1166400, while the sum is 52.

The spelling of 1655616031819 in words is "one trillion, six hundred fifty-five billion, six hundred sixteen million, thirty-one thousand, eight hundred nineteen".