615628730222747 has 4 divisors (see below), whose sum is σ = 615660042420336. Its totient is φ = 615597418025160.

The previous prime is 615628730222707. The next prime is 615628730222749. The reversal of 615628730222747 is 747222037826516.

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 615628730222747 - 2¹⁰ = 615628730221723 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 615628730222747.

It is not an unprimeable number, because it can be changed into a prime (615628730222749) 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, 15656069303 + ... + 15656108624.

It is an arithmetic number, because the mean of its divisors is an integer number (153915010605084).

Almost surely, 2^{615628730222747} is an apocalyptic number.

615628730222747 is a deficient number, since it is larger than the sum of its proper divisors (31312197589).

615628730222747 is a wasteful number, since it uses less digits than its factorization.

615628730222747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31312197588.

The product of its (nonzero) digits is 94832640, while the sum is 62.

The spelling of 615628730222747 in words is "six hundred fifteen trillion, six hundred twenty-eight billion, seven hundred thirty million, two hundred twenty-two thousand, seven hundred forty-seven".