100556211620 has 24 divisors (see below), whose sum is σ = 211694664888. Its totient is φ = 40122176000.

The previous prime is 100556211619. The next prime is 100556211643. The reversal of 100556211620 is 26112655001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20507958436 + 80048253184 = 143206^2 + 282928^2 .

It is a super-2 number, since 2×100556211620² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6261071 + ... + 6277110.

It is an arithmetic number, because the mean of its divisors is an integer number (8820611037).

Almost surely, 2^100556211620 is an apocalyptic number.

100556211620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100556211620 is an abundant number, since it is smaller than the sum of its proper divisors (111138453268).

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

100556211620 is a wasteful number, since it uses less digits than its factorization.

100556211620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12538591 (or 12538589 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

Adding to 100556211620 its reverse (26112655001), we get a palindrome (126668866621).

The spelling of 100556211620 in words is "one hundred billion, five hundred fifty-six million, two hundred eleven thousand, six hundred twenty".