11331272477 has 16 divisors (see below), whose sum is σ = 13211154432. Its totient is φ = 9518313840.

The previous prime is 11331272471. The next prime is 11331272507. The reversal of 11331272477 is 77427213311.

It is a happy number.

It is not a de Polignac number, because 11331272477 - 2⁴ = 11331272461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11331272477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331272471) 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, 14738 + ... + 151260.

It is an arithmetic number, because the mean of its divisors is an integer number (825697152).

Almost surely, 2^11331272477 is an apocalyptic number.

It is an amenable number.

11331272477 is a deficient number, since it is larger than the sum of its proper divisors (1879881955).

11331272477 is a wasteful number, since it uses less digits than its factorization.

11331272477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136768.

The product of its digits is 49392, while the sum is 38.

Adding to 11331272477 its reverse (77427213311), we get a palindrome (88758485788).

The spelling of 11331272477 in words is "eleven billion, three hundred thirty-one million, two hundred seventy-two thousand, four hundred seventy-seven".