1640412757506 has 32 divisors (see below), whose sum is σ = 3303064008000. Its totient is φ = 543098325440.

The previous prime is 1640412757337. The next prime is 1640412757531. The reversal of 1640412757506 is 6057572140461.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15663436 + ... + 15767816.

It is an arithmetic number, because the mean of its divisors is an integer number (103220750250).

Almost surely, 2^{1640412757506} is an apocalyptic number.

1640412757506 is an abundant number, since it is smaller than the sum of its proper divisors (1662651250494).

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

1640412757506 is a wasteful number, since it uses less digits than its factorization.

1640412757506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122114.

The product of its (nonzero) digits is 1411200, while the sum is 48.

Adding to 1640412757506 its reverse (6057572140461), we get a palindrome (7697984897967).

The spelling of 1640412757506 in words is "one trillion, six hundred forty billion, four hundred twelve million, seven hundred fifty-seven thousand, five hundred six".