12154603562 has 4 divisors (see below), whose sum is σ = 18231905346. Its totient is φ = 6077301780.

The previous prime is 12154603553. The next prime is 12154603567. The reversal of 12154603562 is 26530645121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 26530645121 = 43 ⋅616991747.

It can be written as a sum of positive squares in only one way, i.e., 10951831801 + 1202771761 = 104651^2 + 34681^2 .

It is not an unprimeable number, because it can be changed into a prime (12154603567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3038650889 + ... + 3038650892.

Almost surely, 2^12154603562 is an apocalyptic number.

12154603562 is a deficient number, since it is larger than the sum of its proper divisors (6077301784).

12154603562 is an equidigital number, since it uses as much as digits as its factorization.

12154603562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6077301783.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 12154603562 in words is "twelve billion, one hundred fifty-four million, six hundred three thousand, five hundred sixty-two".