1577139128947 has 2 divisors, whose sum is σ = 1577139128948. Its totient is φ = 1577139128946.

The previous prime is 1577139128933. The next prime is 1577139129011. The reversal of 1577139128947 is 7498219317751.

It is an a-pointer prime, because the next prime (1577139129011) can be obtained adding 1577139128947 to its sum of digits (64).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1577139128947 - 2¹⁵ = 1577139096179 is a prime.

It is not a weakly prime, because it can be changed into another prime (1577139128447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 788569564473 + 788569564474.

It is an arithmetic number, because the mean of its divisors is an integer number (788569564474).

Almost surely, 2^{1577139128947} is an apocalyptic number.

1577139128947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1577139128947 is an equidigital number, since it uses as much as digits as its factorization.

1577139128947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26671680, while the sum is 64.

The spelling of 1577139128947 in words is "one trillion, five hundred seventy-seven billion, one hundred thirty-nine million, one hundred twenty-eight thousand, nine hundred forty-seven".