1951941500129 has 2 divisors, whose sum is σ = 1951941500130. Its totient is φ = 1951941500128.

The previous prime is 1951941500077. The next prime is 1951941500141. The reversal of 1951941500129 is 9210051491591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1648715064529 + 303226435600 = 1284023^2 + 550660^2 .

It is a cyclic number.

It is not a de Polignac number, because 1951941500129 - 2³² = 1947646532833 is a prime.

It is not a weakly prime, because it can be changed into another prime (1951941530129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 975970750064 + 975970750065.

It is an arithmetic number, because the mean of its divisors is an integer number (975970750065).

Almost surely, 2^{1951941500129} is an apocalyptic number.

It is an amenable number.

1951941500129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1951941500129 is an equidigital number, since it uses as much as digits as its factorization.

1951941500129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145800, while the sum is 47.

The spelling of 1951941500129 in words is "one trillion, nine hundred fifty-one billion, nine hundred forty-one million, five hundred thousand, one hundred twenty-nine".