647412531402 has 128 divisors (see below), whose sum is σ = 1682267811840. Its totient is φ = 161300367360.

The previous prime is 647412531397. The next prime is 647412531439. The reversal of 647412531402 is 204135214746.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3573627 + ... + 3750417.

It is an arithmetic number, because the mean of its divisors is an integer number (13142717280).

Almost surely, 2^647412531402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647412531402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (841133905920).

647412531402 is an abundant number, since it is smaller than the sum of its proper divisors (1034855280438).

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

647412531402 is a wasteful number, since it uses less digits than its factorization.

647412531402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177188.

The product of its (nonzero) digits is 161280, while the sum is 39.

The spelling of 647412531402 in words is "six hundred forty-seven billion, four hundred twelve million, five hundred thirty-one thousand, four hundred two".