13170531477 has 4 divisors (see below), whose sum is σ = 17560708640. Its totient is φ = 8780354316.

The previous prime is 13170531461. The next prime is 13170531497. The reversal of 13170531477 is 77413507131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13170531477 - 2⁴ = 13170531461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13170531497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2195088577 + ... + 2195088582.

It is an arithmetic number, because the mean of its divisors is an integer number (4390177160).

Almost surely, 2^13170531477 is an apocalyptic number.

It is an amenable number.

13170531477 is a deficient number, since it is larger than the sum of its proper divisors (4390177163).

13170531477 is an equidigital number, since it uses as much as digits as its factorization.

13170531477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4390177162.

The product of its (nonzero) digits is 61740, while the sum is 39.

The spelling of 13170531477 in words is "thirteen billion, one hundred seventy million, five hundred thirty-one thousand, four hundred seventy-seven".