1577139109541 has 2 divisors, whose sum is σ = 1577139109542. Its totient is φ = 1577139109540.

The previous prime is 1577139109523. The next prime is 1577139109607. The reversal of 1577139109541 is 1459019317751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1272135852100 + 305003257441 = 1127890^2 + 552271^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1577139109541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1577139109841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 788569554770 + 788569554771.

It is an arithmetic number, because the mean of its divisors is an integer number (788569554771).

Almost surely, 2^{1577139109541} is an apocalyptic number.

It is an amenable number.

1577139109541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1577139109541 is an equidigital number, since it uses as much as digits as its factorization.

1577139109541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1190700, while the sum is 53.

The spelling of 1577139109541 in words is "one trillion, five hundred seventy-seven billion, one hundred thirty-nine million, one hundred nine thousand, five hundred forty-one".