1621554730134 has 16 divisors (see below), whose sum is σ = 3244559245488. Its totient is φ = 540276612512.

The previous prime is 1621554730111. The next prime is 1621554730153. The reversal of 1621554730134 is 4310374551261.

It is a happy number.

It is a super-4 number, since 4×1621554730134⁴ (a number of 50 digits) contains 4444 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 60393177 + ... + 60420020.

It is an arithmetic number, because the mean of its divisors is an integer number (202784952843).

Almost surely, 2^{1621554730134} is an apocalyptic number.

1621554730134 is an abundant number, since it is smaller than the sum of its proper divisors (1623004515354).

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

1621554730134 is a wasteful number, since it uses less digits than its factorization.

1621554730134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120815439.

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 1621554730134 in words is "one trillion, six hundred twenty-one billion, five hundred fifty-four million, seven hundred thirty thousand, one hundred thirty-four".