1561702272 has 64 divisors (see below), whose sum is σ = 4467383760. Its totient is φ = 480522240.

The previous prime is 1561702271. The next prime is 1561702291. The reversal of 1561702272 is 2722071651.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561702271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151429 + ... + 161412.

Almost surely, 2^1561702272 is an apocalyptic number.

1561702272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1561702272 is an abundant number, since it is smaller than the sum of its proper divisors (2905681488).

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

1561702272 is a wasteful number, since it uses less digits than its factorization.

1561702272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312871 (or 312859 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 1561702272 is about 39518.3789141205. The cubic root of 1561702272 is about 1160.1996960996.

The spelling of 1561702272 in words is "one billion, five hundred sixty-one million, seven hundred two thousand, two hundred seventy-two".