611587421563 has 2 divisors, whose sum is σ = 611587421564. Its totient is φ = 611587421562.

The previous prime is 611587421551. The next prime is 611587421567. The reversal of 611587421563 is 365124785116.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-611587421563 is a prime.

It is not a weakly prime, because it can be changed into another prime (611587421567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305793710781 + 305793710782.

It is an arithmetic number, because the mean of its divisors is an integer number (305793710782).

Almost surely, 2^611587421563 is an apocalyptic number.

611587421563 is a deficient number, since it is larger than the sum of its proper divisors (1).

611587421563 is an equidigital number, since it uses as much as digits as its factorization.

611587421563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 49.

The spelling of 611587421563 in words is "six hundred eleven billion, five hundred eighty-seven million, four hundred twenty-one thousand, five hundred sixty-three".