915990655243 has 4 divisors (see below), whose sum is σ = 945538740928. Its totient is φ = 886442569560.

The previous prime is 915990655211. The next prime is 915990655247. The reversal of 915990655243 is 342556099519.

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 915990655243 - 2⁵ = 915990655211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (915990655247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14774042796 + ... + 14774042857.

It is an arithmetic number, because the mean of its divisors is an integer number (236384685232).

Almost surely, 2^915990655243 is an apocalyptic number.

915990655243 is a deficient number, since it is larger than the sum of its proper divisors (29548085685).

915990655243 is a wasteful number, since it uses less digits than its factorization.

915990655243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29548085684.

The product of its (nonzero) digits is 13122000, while the sum is 58.

The spelling of 915990655243 in words is "nine hundred fifteen billion, nine hundred ninety million, six hundred fifty-five thousand, two hundred forty-three".