391046862541 has 2 divisors, whose sum is σ = 391046862542. Its totient is φ = 391046862540.

The previous prime is 391046862533. The next prime is 391046862553. The reversal of 391046862541 is 145268640193.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 390651250441 + 395612100 = 625021^2 + 19890^2 .

It is a cyclic number.

It is not a de Polignac number, because 391046862541 - 2³ = 391046862533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (391046862581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195523431270 + 195523431271.

It is an arithmetic number, because the mean of its divisors is an integer number (195523431271).

Almost surely, 2^391046862541 is an apocalyptic number.

It is an amenable number.

391046862541 is a deficient number, since it is larger than the sum of its proper divisors (1).

391046862541 is an equidigital number, since it uses as much as digits as its factorization.

391046862541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 391046862541 in words is "three hundred ninety-one billion, forty-six million, eight hundred sixty-two thousand, five hundred forty-one".