11431404477 has 8 divisors (see below), whose sum is σ = 16935414080. Its totient is φ = 7620936300.

The previous prime is 11431404421. The next prime is 11431404529. The reversal of 11431404477 is 77440413411.

11431404477 is a `hidden beast` number, since 1 + 1 + 43 + 140 + 4 + 477 = 666.

It is not a de Polignac number, because 11431404477 - 2²³ = 11423015869 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 (11431404077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211692649 + ... + 211692702.

It is an arithmetic number, because the mean of its divisors is an integer number (2116926760).

Almost surely, 2^11431404477 is an apocalyptic number.

It is an amenable number.

11431404477 is a deficient number, since it is larger than the sum of its proper divisors (5504009603).

11431404477 is an equidigital number, since it uses as much as digits as its factorization.

11431404477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423385360 (or 423385354 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

Adding to 11431404477 its reverse (77440413411), we get a palindrome (88871817888).

The spelling of 11431404477 in words is "eleven billion, four hundred thirty-one million, four hundred four thousand, four hundred seventy-seven".