15781046252 has 6 divisors (see below), whose sum is σ = 27616830948. Its totient is φ = 7890523124.

The previous prime is 15781046251. The next prime is 15781046291. The reversal of 15781046252 is 25264018751.

It is not an unprimeable number, because it can be changed into a prime (15781046251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1972630778 + ... + 1972630785.

It is an arithmetic number, because the mean of its divisors is an integer number (4602805158).

Almost surely, 2^15781046252 is an apocalyptic number.

It is an amenable number.

15781046252 is a deficient number, since it is larger than the sum of its proper divisors (11835784696).

15781046252 is a wasteful number, since it uses less digits than its factorization.

15781046252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3945261567 (or 3945261565 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 41.

The spelling of 15781046252 in words is "fifteen billion, seven hundred eighty-one million, forty-six thousand, two hundred fifty-two".