1956782551 has 2 divisors, whose sum is σ = 1956782552. Its totient is φ = 1956782550.

The previous prime is 1956782549. The next prime is 1956782579. The reversal of 1956782551 is 1552876591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1956782551 - 2¹ = 1956782549 is a prime.

Together with 1956782549, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1956782495 and 1956782504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1956782591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978391275 + 978391276.

It is an arithmetic number, because the mean of its divisors is an integer number (978391276).

Almost surely, 2^1956782551 is an apocalyptic number.

1956782551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1956782551 is an equidigital number, since it uses as much as digits as its factorization.

1956782551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756000, while the sum is 49.

The square root of 1956782551 is about 44235.5349351627. The cubic root of 1956782551 is about 1250.7797909863.

The spelling of 1956782551 in words is "one billion, nine hundred fifty-six million, seven hundred eighty-two thousand, five hundred fifty-one".