647515715450 has 48 divisors (see below), whose sum is σ = 1227790050336. Its totient is φ = 253977172800.

The previous prime is 647515715449. The next prime is 647515715489. The reversal of 647515715450 is 54517515746.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4731689 + ... + 4866611.

It is an arithmetic number, because the mean of its divisors is an integer number (25578959382).

Almost surely, 2^647515715450 is an apocalyptic number.

647515715450 is a deficient number, since it is larger than the sum of its proper divisors (580274334886).

647515715450 is a wasteful number, since it uses less digits than its factorization.

647515715450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136799 (or 136794 counting only the distinct ones).

The product of its (nonzero) digits is 2940000, while the sum is 50.

The spelling of 647515715450 in words is "six hundred forty-seven billion, five hundred fifteen million, seven hundred fifteen thousand, four hundred fifty".