615620711051 has 4 divisors (see below), whose sum is σ = 651833694072. Its totient is φ = 579407728032.

The previous prime is 615620710967. The next prime is 615620711099. The reversal of 615620711051 is 150117026516.

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

It is a cyclic number.

It is not a de Polignac number, because 615620711051 - 2¹⁰ = 615620710027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (615620711551) 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, 18106491485 + ... + 18106491518.

It is an arithmetic number, because the mean of its divisors is an integer number (162958423518).

Almost surely, 2^615620711051 is an apocalyptic number.

615620711051 is a deficient number, since it is larger than the sum of its proper divisors (36212983021).

615620711051 is a wasteful number, since it uses less digits than its factorization.

615620711051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36212983020.

The product of its (nonzero) digits is 12600, while the sum is 35.

Adding to 615620711051 its reverse (150117026516), we get a palindrome (765737737567).

The spelling of 615620711051 in words is "six hundred fifteen billion, six hundred twenty million, seven hundred eleven thousand, fifty-one".