15625235420 has 96 divisors (see below), whose sum is σ = 34101055296. Its totient is φ = 6009292800.

The previous prime is 15625235411. The next prime is 15625235453. The reversal of 15625235420 is 2453252651.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33893990 + ... + 33894450.

It is an arithmetic number, because the mean of its divisors is an integer number (355219326).

Almost surely, 2^15625235420 is an apocalyptic number.

15625235420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15625235420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17050527648).

15625235420 is an abundant number, since it is smaller than the sum of its proper divisors (18475819876).

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

15625235420 is a wasteful number, since it uses less digits than its factorization.

15625235420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951 (or 949 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 15625235420 in words is "fifteen billion, six hundred twenty-five million, two hundred thirty-five thousand, four hundred twenty".