615411207613 has 4 divisors (see below), whose sum is σ = 619331024380. Its totient is φ = 611491390848.

The previous prime is 615411207599. The next prime is 615411207637. The reversal of 615411207613 is 316702114516.

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 231262886404 + 384148321209 = 480898^2 + 619797^2 .

It is a cyclic number.

It is not a de Polignac number, because 615411207613 - 2²⁵ = 615377653181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (615411207413) 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, 1959908148 + ... + 1959908461.

It is an arithmetic number, because the mean of its divisors is an integer number (154832756095).

Almost surely, 2^615411207613 is an apocalyptic number.

It is an amenable number.

615411207613 is a deficient number, since it is larger than the sum of its proper divisors (3919816767).

615411207613 is a wasteful number, since it uses less digits than its factorization.

615411207613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3919816766.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 615411207613 in words is "six hundred fifteen billion, four hundred eleven million, two hundred seven thousand, six hundred thirteen".