15620121426 has 96 divisors (see below), whose sum is σ = 40695920640. Its totient is φ = 3902738112.

The previous prime is 15620121389. The next prime is 15620121437. The reversal of 15620121426 is 62412102651.

It is a super-3 number, since 3×15620121426³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15620121393 and 15620121402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76951 + ... + 192773.

It is an arithmetic number, because the mean of its divisors is an integer number (423915840).

Almost surely, 2^15620121426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15620121426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20347960320).

15620121426 is an abundant number, since it is smaller than the sum of its proper divisors (25075799214).

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

15620121426 is a wasteful number, since it uses less digits than its factorization.

15620121426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115880 (or 115867 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The spelling of 15620121426 in words is "fifteen billion, six hundred twenty million, one hundred twenty-one thousand, four hundred twenty-six".