355138721023 has 2 divisors, whose sum is σ = 355138721024. Its totient is φ = 355138721022.

The previous prime is 355138721009. The next prime is 355138721033. The reversal of 355138721023 is 320127831553.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 355138721023 - 2⁹ = 355138720511 is a prime.

It is a super-2 number, since 2×355138721023² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (355138721033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177569360511 + 177569360512.

It is an arithmetic number, because the mean of its divisors is an integer number (177569360512).

Almost surely, 2^355138721023 is an apocalyptic number.

355138721023 is a deficient number, since it is larger than the sum of its proper divisors (1).

355138721023 is an equidigital number, since it uses as much as digits as its factorization.

355138721023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 355138721023 in words is "three hundred fifty-five billion, one hundred thirty-eight million, seven hundred twenty-one thousand, twenty-three".