1956051901 has 2 divisors, whose sum is σ = 1956051902. Its totient is φ = 1956051900.

The previous prime is 1956051899. The next prime is 1956051931. The reversal of 1956051901 is 1091506591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1887989401 + 68062500 = 43451^2 + 8250^2 .

It is a cyclic number.

It is not a de Polignac number, because 1956051901 - 2¹ = 1956051899 is a prime.

It is a super-2 number, since 2×1956051901² = 7652278078811427602, which contains 22 as substring.

Together with 1956051899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1956051931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978025950 + 978025951.

It is an arithmetic number, because the mean of its divisors is an integer number (978025951).

Almost surely, 2^1956051901 is an apocalyptic number.

It is an amenable number.

1956051901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1956051901 is an equidigital number, since it uses as much as digits as its factorization.

1956051901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12150, while the sum is 37.

The square root of 1956051901 is about 44227.2755321871. The cubic root of 1956051901 is about 1250.6240939003.

It can be divided in two parts, 195605 and 1901, that added together give a triangular number (197506 = T₆₂₈).

The spelling of 1956051901 in words is "one billion, nine hundred fifty-six million, fifty-one thousand, nine hundred one".