615611052201 has 4 divisors (see below), whose sum is σ = 820814736272. Its totient is φ = 410407368132.

The previous prime is 615611052197. The next prime is 615611052223. The reversal of 615611052201 is 102250116516.

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 not a de Polignac number, because 615611052201 - 2² = 615611052197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (615611052101) 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, 102601842031 + ... + 102601842036.

It is an arithmetic number, because the mean of its divisors is an integer number (205203684068).

Almost surely, 2^615611052201 is an apocalyptic number.

It is an amenable number.

615611052201 is a deficient number, since it is larger than the sum of its proper divisors (205203684071).

615611052201 is a wasteful number, since it uses less digits than its factorization.

615611052201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205203684070.

The product of its (nonzero) digits is 3600, while the sum is 30.

Adding to 615611052201 its reverse (102250116516), we get a palindrome (717861168717).

The spelling of 615611052201 in words is "six hundred fifteen billion, six hundred eleven million, fifty-two thousand, two hundred one".