15423554544642 has 12 divisors (see below), whose sum is σ = 33417701513430. Its totient is φ = 5141184848208.

The previous prime is 15423554544631. The next prime is 15423554544709. The reversal of 15423554544642 is 24644545532451.

15423554544642 is a `hidden beast` number, since 1 + 5 + 4 + 2 + 3 + 5 + 54 + 544 + 6 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15421258314081 + 2296230561 = 3926991^2 + 47919^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 428432070667 + ... + 428432070702.

Almost surely, 2^{15423554544642} is an apocalyptic number.

15423554544642 is an abundant number, since it is smaller than the sum of its proper divisors (17994146968788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15423554544642 is a wasteful number, since it uses less digits than its factorization.

15423554544642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856864141377 (or 856864141374 counting only the distinct ones).

The product of its digits is 46080000, while the sum is 54.

The spelling of 15423554544642 in words is "fifteen trillion, four hundred twenty-three billion, five hundred fifty-four million, five hundred forty-four thousand, six hundred forty-two".