15421105420650 has 144 divisors (see below), whose sum is σ = 41596171621056. Its totient is φ = 4095963970560.

The previous prime is 15421105420597. The next prime is 15421105420697. The reversal of 15421105420650 is 5602450112451.

15421105420650 is a `hidden beast` number, since 1 + 5 + 42 + 1 + 10 + 542 + 0 + 65 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 140209579 + ... + 140319521.

It is an arithmetic number, because the mean of its divisors is an integer number (288862302924).

Almost surely, 2^{15421105420650} is an apocalyptic number.

15421105420650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15421105420650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20798085810528).

15421105420650 is an abundant number, since it is smaller than the sum of its proper divisors (26175066200406).

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

15421105420650 is a wasteful number, since it uses less digits than its factorization.

15421105420650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111197 (or 111189 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The spelling of 15421105420650 in words is "fifteen trillion, four hundred twenty-one billion, one hundred five million, four hundred twenty thousand, six hundred fifty".