647238701052 has 36 divisors (see below), whose sum is σ = 1651959844080. Its totient is φ = 213651608832.

The previous prime is 647238701009. The next prime is 647238701099. The reversal of 647238701052 is 250107832746.

647238701052 is a `hidden beast` number, since 6 + 472 + 3 + 8 + 70 + 105 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×647238701052² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 647238700989 and 647238701007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87272277 + ... + 87279692.

Almost surely, 2^647238701052 is an apocalyptic number.

It is an amenable number.

647238701052 is an abundant number, since it is smaller than the sum of its proper divisors (1004721143028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647238701052 is a wasteful number, since it uses less digits than its factorization.

647238701052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174552082 (or 174552077 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 647238701052 in words is "six hundred forty-seven billion, two hundred thirty-eight million, seven hundred one thousand, fifty-two".