1640247499560 has 64 divisors (see below), whose sum is σ = 4920831031680. Its totient is φ = 437391463680.

The previous prime is 1640247499547. The next prime is 1640247499609. The reversal of 1640247499560 is 659947420461.

It is a self number, because there is not a number n which added to its sum of digits gives 1640247499560.

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, 10103994 + ... + 10265046.

It is an arithmetic number, because the mean of its divisors is an integer number (76887984870).

Almost surely, 2^{1640247499560} is an apocalyptic number.

1640247499560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1640247499560 is an abundant number, since it is smaller than the sum of its proper divisors (3280583532120).

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

1640247499560 is a wasteful number, since it uses less digits than its factorization.

1640247499560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245938 (or 245934 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 57.

The spelling of 1640247499560 in words is "one trillion, six hundred forty billion, two hundred forty-seven million, four hundred ninety-nine thousand, five hundred sixty".