1642538950111 has 2 divisors, whose sum is σ = 1642538950112. Its totient is φ = 1642538950110.

The previous prime is 1642538950093. The next prime is 1642538950127. The reversal of 1642538950111 is 1110598352461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1642538950111 - 2⁵ = 1642538950079 is a prime.

It is a super-2 number, since 2×1642538950111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1642538950141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821269475055 + 821269475056.

It is an arithmetic number, because the mean of its divisors is an integer number (821269475056).

Almost surely, 2^{1642538950111} is an apocalyptic number.

1642538950111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642538950111 is an equidigital number, since it uses as much as digits as its factorization.

1642538950111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 46.

The spelling of 1642538950111 in words is "one trillion, six hundred forty-two billion, five hundred thirty-eight million, nine hundred fifty thousand, one hundred eleven".