11171978530 has 16 divisors (see below), whose sum is σ = 21167959680. Its totient is φ = 4233591792.

The previous prime is 11171978527. The next prime is 11171978539. The reversal of 11171978530 is 3587917111.

It is not an unprimeable number, because it can be changed into a prime (11171978539) 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, 29399754 + ... + 29400133.

It is an arithmetic number, because the mean of its divisors is an integer number (1322997480).

Almost surely, 2^11171978530 is an apocalyptic number.

11171978530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11171978530 is a deficient number, since it is larger than the sum of its proper divisors (9995981150).

11171978530 is a wasteful number, since it uses less digits than its factorization.

11171978530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58799913.

The product of its (nonzero) digits is 52920, while the sum is 43.

The spelling of 11171978530 in words is "eleven billion, one hundred seventy-one million, nine hundred seventy-eight thousand, five hundred thirty".