1971579412951 has 2 divisors, whose sum is σ = 1971579412952. Its totient is φ = 1971579412950.

The previous prime is 1971579412939. The next prime is 1971579412969. The reversal of 1971579412951 is 1592149751791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1971579412951 - 2¹³ = 1971579404759 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1971579412951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1971579412981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 985789706475 + 985789706476.

It is an arithmetic number, because the mean of its divisors is an integer number (985789706476).

Almost surely, 2^{1971579412951} is an apocalyptic number.

1971579412951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1971579412951 is an equidigital number, since it uses as much as digits as its factorization.

1971579412951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7144200, while the sum is 61.

The spelling of 1971579412951 in words is "one trillion, nine hundred seventy-one billion, five hundred seventy-nine million, four hundred twelve thousand, nine hundred fifty-one".