1621514523442 has 32 divisors (see below), whose sum is σ = 2796165546624. Its totient is φ = 698026032000.

The previous prime is 1621514523427. The next prime is 1621514523443. The reversal of 1621514523442 is 2443254151261.

It is a super-3 number, since 3×1621514523442³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1621514523395 and 1621514523404.

It is not an unprimeable number, because it can be changed into a prime (1621514523443) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 15813123 + ... + 15915334.

It is an arithmetic number, because the mean of its divisors is an integer number (87380173332).

Almost surely, 2^{1621514523442} is an apocalyptic number.

1621514523442 is a deficient number, since it is larger than the sum of its proper divisors (1174651023182).

1621514523442 is a wasteful number, since it uses less digits than its factorization.

1621514523442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31728594.

The product of its digits is 230400, while the sum is 40.

The spelling of 1621514523442 in words is "one trillion, six hundred twenty-one billion, five hundred fourteen million, five hundred twenty-three thousand, four hundred forty-two".