101621636442 has 48 divisors (see below), whose sum is σ = 220700712960. Its totient is φ = 33793904736.

The previous prime is 101621636407. The next prime is 101621636447. The reversal of 101621636442 is 244636126101.

101621636442 is a `hidden beast` number, since 1 + 0 + 1 + 6 + 2 + 1 + 6 + 3 + 644 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 101621636397 and 101621636406.

It is not an unprimeable number, because it can be changed into a prime (101621636447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15121159 + ... + 15127877.

It is an arithmetic number, because the mean of its divisors is an integer number (4597931520).

Almost surely, 2^101621636442 is an apocalyptic number.

101621636442 is an abundant number, since it is smaller than the sum of its proper divisors (119079076518).

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

101621636442 is a wasteful number, since it uses less digits than its factorization.

101621636442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8587 (or 8584 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 101621636442 in words is "one hundred one billion, six hundred twenty-one million, six hundred thirty-six thousand, four hundred forty-two".