21625159355154 has 96 divisors (see below), whose sum is σ = 50775833332224. Its totient is φ = 6625094837760.

The previous prime is 21625159355143. The next prime is 21625159355159. The reversal of 21625159355154 is 45155395152612.

21625159355154 is a `hidden beast` number, since 2 + 1 + 6 + 25 + 15 + 9 + 3 + 551 + 54 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 21625159355154.

It is not an unprimeable number, because it can be changed into a prime (21625159355159) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58935999 + ... + 59301789.

It is an arithmetic number, because the mean of its divisors is an integer number (528914930544).

Almost surely, 2^{21625159355154} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21625159355154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25387916666112).

21625159355154 is an abundant number, since it is smaller than the sum of its proper divisors (29150673977070).

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

21625159355154 is a wasteful number, since it uses less digits than its factorization.

21625159355154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370352 (or 370349 counting only the distinct ones).

The product of its digits is 8100000, while the sum is 54.

The spelling of 21625159355154 in words is "twenty-one trillion, six hundred twenty-five billion, one hundred fifty-nine million, three hundred fifty-five thousand, one hundred fifty-four".