1577138964477 has 16 divisors (see below), whose sum is σ = 2200421319168. Its totient is φ = 1003570525440.

The previous prime is 1577138964473. The next prime is 1577138964487. The reversal of 1577138964477 is 7744698317751.

It is not a de Polignac number, because 1577138964477 - 2² = 1577138964473 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1577138964473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116147208 + ... + 116160785.

It is an arithmetic number, because the mean of its divisors is an integer number (137526332448).

Almost surely, 2^{1577138964477} is an apocalyptic number.

It is an amenable number.

1577138964477 is a deficient number, since it is larger than the sum of its proper divisors (623282354691).

1577138964477 is a wasteful number, since it uses less digits than its factorization.

1577138964477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232308100.

The product of its digits is 248935680, while the sum is 69.

The spelling of 1577138964477 in words is "one trillion, five hundred seventy-seven billion, one hundred thirty-eight million, nine hundred sixty-four thousand, four hundred seventy-seven".