15552042421546 has 4 divisors (see below), whose sum is σ = 23328063632322. Its totient is φ = 7776021210772.

The previous prime is 15552042421523. The next prime is 15552042421547. The reversal of 15552042421546 is 64512424025551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14971954548321 + 580087873225 = 3869361^2 + 761635^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15552042421496 and 15552042421505.

It is not an unprimeable number, because it can be changed into a prime (15552042421547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3888010605385 + ... + 3888010605388.

Almost surely, 2^{15552042421546} is an apocalyptic number.

15552042421546 is a deficient number, since it is larger than the sum of its proper divisors (7776021210776).

15552042421546 is an equidigital number, since it uses as much as digits as its factorization.

15552042421546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7776021210775.

The product of its (nonzero) digits is 1920000, while the sum is 46.

The spelling of 15552042421546 in words is "fifteen trillion, five hundred fifty-two billion, forty-two million, four hundred twenty-one thousand, five hundred forty-six".