8620548149921 has 2 divisors, whose sum is σ = 8620548149922. Its totient is φ = 8620548149920.

The previous prime is 8620548149891. The next prime is 8620548149933. The reversal of 8620548149921 is 1299418450268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6832682323600 + 1787865826321 = 2613940^2 + 1337111^2 .

It is a cyclic number.

It is not a de Polignac number, because 8620548149921 - 2¹⁴ = 8620548133537 is a prime.

It is not a weakly prime, because it can be changed into another prime (8620548149971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4310274074960 + 4310274074961.

It is an arithmetic number, because the mean of its divisors is an integer number (4310274074961).

Almost surely, 2^{8620548149921} is an apocalyptic number.

It is an amenable number.

8620548149921 is a deficient number, since it is larger than the sum of its proper divisors (1).

8620548149921 is an equidigital number, since it uses as much as digits as its factorization.

8620548149921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9953280, while the sum is 59.

The spelling of 8620548149921 in words is "eight trillion, six hundred twenty billion, five hundred forty-eight million, one hundred forty-nine thousand, nine hundred twenty-one".