1621078886492 has 24 divisors (see below), whose sum is σ = 3160458840000. Its totient is φ = 722390590656.

The previous prime is 1621078886489. The next prime is 1621078886501. The reversal of 1621078886492 is 2946888701261.

It is a super-3 number, since 3×1621078886492³ (a number of 38 digits) contains 333 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 (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 537491492 + ... + 537494507.

It is an arithmetic number, because the mean of its divisors is an integer number (131685785000).

Almost surely, 2^{1621078886492} is an apocalyptic number.

It is an amenable number.

1621078886492 is a deficient number, since it is larger than the sum of its proper divisors (1539379953508).

1621078886492 is a wasteful number, since it uses less digits than its factorization.

1621078886492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074986045 (or 1074986043 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 62.

The spelling of 1621078886492 in words is "one trillion, six hundred twenty-one billion, seventy-eight million, eight hundred eighty-six thousand, four hundred ninety-two".