15671501641 has 4 divisors (see below), whose sum is σ = 16177033984. Its totient is φ = 15165969300.

The previous prime is 15671501639. The next prime is 15671501711. The reversal of 15671501641 is 14610517651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15671501641 - 2¹ = 15671501639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15671501641.

It is not an unprimeable number, because it can be changed into a prime (15671501141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252766125 + ... + 252766186.

It is an arithmetic number, because the mean of its divisors is an integer number (4044258496).

Almost surely, 2^15671501641 is an apocalyptic number.

It is an amenable number.

15671501641 is a deficient number, since it is larger than the sum of its proper divisors (505532343).

15671501641 is an equidigital number, since it uses as much as digits as its factorization.

15671501641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505532342.

The product of its (nonzero) digits is 25200, while the sum is 37.

The spelling of 15671501641 in words is "fifteen billion, six hundred seventy-one million, five hundred one thousand, six hundred forty-one".