354674987521 has 2 divisors, whose sum is σ = 354674987522. Its totient is φ = 354674987520.

The previous prime is 354674987483. The next prime is 354674987531. The reversal of 354674987521 is 125789476453.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182751975025 + 171923012496 = 427495^2 + 414636^2 .

It is a cyclic number.

It is not a de Polignac number, because 354674987521 - 2³⁷ = 217236034049 is a prime.

It is a super-4 number, since 4×354674987521⁴ (a number of 47 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 354674987521.

It is not a weakly prime, because it can be changed into another prime (354674987531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177337493760 + 177337493761.

It is an arithmetic number, because the mean of its divisors is an integer number (177337493761).

Almost surely, 2^354674987521 is an apocalyptic number.

It is an amenable number.

354674987521 is a deficient number, since it is larger than the sum of its proper divisors (1).

354674987521 is an equidigital number, since it uses as much as digits as its factorization.

354674987521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50803200, while the sum is 61.

The spelling of 354674987521 in words is "three hundred fifty-four billion, six hundred seventy-four million, nine hundred eighty-seven thousand, five hundred twenty-one".