15625212402 has 32 divisors (see below), whose sum is σ = 31394119680. Its totient is φ = 5184487440.

The previous prime is 15625212389. The next prime is 15625212409. The reversal of 15625212402 is 20421252651.

It is a super-2 number, since 2×15625212402² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15625212402.

It is not an unprimeable number, because it can be changed into a prime (15625212409) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2488527 + ... + 2494797.

It is an arithmetic number, because the mean of its divisors is an integer number (981066240).

Almost surely, 2^15625212402 is an apocalyptic number.

15625212402 is an abundant number, since it is smaller than the sum of its proper divisors (15768907278).

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

15625212402 is a wasteful number, since it uses less digits than its factorization.

15625212402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8118.

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 15625212402 in words is "fifteen billion, six hundred twenty-five million, two hundred twelve thousand, four hundred two".