12155664530 has 16 divisors (see below), whose sum is σ = 23167266840. Its totient is φ = 4576250112.

The previous prime is 12155664491. The next prime is 12155664551. The reversal of 12155664530 is 3546655121.

It can be written as a sum of positive squares in 4 ways, for example, as 12144260401 + 11404129 = 110201^2 + 3377^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35751785 + ... + 35752124.

Almost surely, 2^12155664530 is an apocalyptic number.

12155664530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12155664530 is a deficient number, since it is larger than the sum of its proper divisors (11011602310).

12155664530 is a wasteful number, since it uses less digits than its factorization.

12155664530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71503933.

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 12155664530 in words is "twelve billion, one hundred fifty-five million, six hundred sixty-four thousand, five hundred thirty".