15407201561 has 4 divisors (see below), whose sum is σ = 15823612452. Its totient is φ = 14990790672.

The previous prime is 15407201533. The next prime is 15407201581. The reversal of 15407201561 is 16510270451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5438177536 + 9969024025 = 73744^2 + 99845^2 .

It is a cyclic number.

It is not a de Polignac number, because 15407201561 - 2¹⁰ = 15407200537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15407201501) 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 3 ways as a sum of consecutive naturals, for example, 208205390 + ... + 208205463.

It is an arithmetic number, because the mean of its divisors is an integer number (3955903113).

Almost surely, 2^15407201561 is an apocalyptic number.

It is an amenable number.

15407201561 is a deficient number, since it is larger than the sum of its proper divisors (416410891).

15407201561 is an equidigital number, since it uses as much as digits as its factorization.

15407201561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416410890.

The product of its (nonzero) digits is 8400, while the sum is 32.

The spelling of 15407201561 in words is "fifteen billion, four hundred seven million, two hundred one thousand, five hundred sixty-one".