1401544143991 has 2 divisors, whose sum is σ = 1401544143992. Its totient is φ = 1401544143990.

The previous prime is 1401544143949. The next prime is 1401544144019. The reversal of 1401544143991 is 1993414451041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1401544143991 - 2²⁹ = 1401007273079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401544143911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700772071995 + 700772071996.

It is an arithmetic number, because the mean of its divisors is an integer number (700772071996).

Almost surely, 2^{1401544143991} is an apocalyptic number.

1401544143991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401544143991 is an equidigital number, since it uses as much as digits as its factorization.

1401544143991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 1401544143991 in words is "one trillion, four hundred one billion, five hundred forty-four million, one hundred forty-three thousand, nine hundred ninety-one".