131773501557 has 24 divisors (see below), whose sum is σ = 194269470720. Its totient is φ = 86047224480.

The previous prime is 131773501543. The next prime is 131773501577. The reversal of 131773501557 is 755105377131.

131773501557 is a `hidden beast` number, since 13 + 17 + 73 + 5 + 0 + 1 + 557 = 666.

It is not a de Polignac number, because 131773501557 - 2¹⁸ = 131773239413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131773501577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 370933 + ... + 633354.

It is an arithmetic number, because the mean of its divisors is an integer number (8094561280).

Almost surely, 2^131773501557 is an apocalyptic number.

It is an amenable number.

131773501557 is a deficient number, since it is larger than the sum of its proper divisors (62495969163).

131773501557 is a wasteful number, since it uses less digits than its factorization.

131773501557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004593 (or 1004590 counting only the distinct ones).

The product of its (nonzero) digits is 385875, while the sum is 45.

Adding to 131773501557 its reverse (755105377131), we get a palindrome (886878878688).

The spelling of 131773501557 in words is "one hundred thirty-one billion, seven hundred seventy-three million, five hundred one thousand, five hundred fifty-seven".