621155411102 has 64 divisors (see below), whose sum is σ = 1001304944640. Its totient is φ = 288133977600.

The previous prime is 621155411089. The next prime is 621155411113. The reversal of 621155411102 is 201114551126.

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 31 ways as a sum of consecutive naturals, for example, 356779952 + ... + 356781692.

It is an arithmetic number, because the mean of its divisors is an integer number (15645389760).

Almost surely, 2^621155411102 is an apocalyptic number.

621155411102 is a deficient number, since it is larger than the sum of its proper divisors (380149533538).

621155411102 is a wasteful number, since it uses less digits than its factorization.

621155411102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2649.

The product of its (nonzero) digits is 2400, while the sum is 29.

Adding to 621155411102 its reverse (201114551126), we get a palindrome (822269962228).

The spelling of 621155411102 in words is "six hundred twenty-one billion, one hundred fifty-five million, four hundred eleven thousand, one hundred two".