1615241641 has 4 divisors (see below), whose sum is σ = 1739491012. Its totient is φ = 1490992272.

The previous prime is 1615241629. The next prime is 1615241657. The reversal of 1615241641 is 1461425161.

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 935075241 + 680166400 = 30579^2 + 26080^2 .

It is a cyclic number.

It is not a de Polignac number, because 1615241641 - 2⁷ = 1615241513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1615241041) 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, 62124666 + ... + 62124691.

It is an arithmetic number, because the mean of its divisors is an integer number (434872753).

Almost surely, 2^1615241641 is an apocalyptic number.

It is an amenable number.

1615241641 is a deficient number, since it is larger than the sum of its proper divisors (124249371).

1615241641 is a wasteful number, since it uses less digits than its factorization.

1615241641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124249370.

The product of its digits is 5760, while the sum is 31.

The square root of 1615241641 is about 40190.0689349994. The cubic root of 1615241641 is about 1173.3092667796.

The spelling of 1615241641 in words is "one billion, six hundred fifteen million, two hundred forty-one thousand, six hundred forty-one".