654154452121 has 2 divisors, whose sum is σ = 654154452122. Its totient is φ = 654154452120.

The previous prime is 654154452079. The next prime is 654154452131. The reversal of 654154452121 is 121254451456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 414911186496 + 239243265625 = 644136^2 + 489125^2 .

It is a cyclic number.

It is not a de Polignac number, because 654154452121 - 2²⁷ = 654020234393 is a prime.

It is not a weakly prime, because it can be changed into another prime (654154452131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327077226060 + 327077226061.

It is an arithmetic number, because the mean of its divisors is an integer number (327077226061).

Almost surely, 2^654154452121 is an apocalyptic number.

It is an amenable number.

654154452121 is a deficient number, since it is larger than the sum of its proper divisors (1).

654154452121 is an equidigital number, since it uses as much as digits as its factorization.

654154452121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192000, while the sum is 40.

The spelling of 654154452121 in words is "six hundred fifty-four billion, one hundred fifty-four million, four hundred fifty-two thousand, one hundred twenty-one".