15554034542420 has 72 divisors (see below), whose sum is σ = 35958320036352. Its totient is φ = 5647270087360.

The previous prime is 15554034542413. The next prime is 15554034542461. The reversal of 15554034542420 is 2424543045551.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3401252 + ... + 6532731.

It is an arithmetic number, because the mean of its divisors is an integer number (499421111616).

Almost surely, 2^{15554034542420} is an apocalyptic number.

15554034542420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15554034542420 is an abundant number, since it is smaller than the sum of its proper divisors (20404285493932).

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

15554034542420 is a wasteful number, since it uses less digits than its factorization.

15554034542420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9934661 (or 9934648 counting only the distinct ones).

The product of its (nonzero) digits is 1920000, while the sum is 44.

Adding to 15554034542420 its reverse (2424543045551), we get a palindrome (17978577587971).

The spelling of 15554034542420 in words is "fifteen trillion, five hundred fifty-four billion, thirty-four million, five hundred forty-two thousand, four hundred twenty".