1640598710480 has 20 divisors (see below), whose sum is σ = 3814392002052. Its totient is φ = 656239484160.

The previous prime is 1640598710473. The next prime is 1640598710539. The reversal of 1640598710480 is 840178950461.

It can be written as a sum of positive squares in 2 ways, for example, as 1090829847184 + 549768863296 = 1044428^2 + 741464^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10253741861 + ... + 10253742020.

Almost surely, 2^{1640598710480} is an apocalyptic number.

1640598710480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1640598710480 is an abundant number, since it is smaller than the sum of its proper divisors (2173793291572).

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

1640598710480 is a wasteful number, since it uses less digits than its factorization.

1640598710480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20507483894 (or 20507483888 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 1640598710480 in words is "one trillion, six hundred forty billion, five hundred ninety-eight million, seven hundred ten thousand, four hundred eighty".