1016780554631 has 2 divisors, whose sum is σ = 1016780554632. Its totient is φ = 1016780554630.

The previous prime is 1016780554583. The next prime is 1016780554633. The reversal of 1016780554631 is 1364550876101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1016780554631 - 2⁶ = 1016780554567 is a prime.

It is a super-2 number, since 2×1016780554631² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 1016780554633, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1016780554633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 508390277315 + 508390277316.

It is an arithmetic number, because the mean of its divisors is an integer number (508390277316).

Almost surely, 2^{1016780554631} is an apocalyptic number.

1016780554631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1016780554631 is an equidigital number, since it uses as much as digits as its factorization.

1016780554631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 1016780554631 in words is "one trillion, sixteen billion, seven hundred eighty million, five hundred fifty-four thousand, six hundred thirty-one".