1200640497066 has 40 divisors (see below), whose sum is σ = 2807294697504. Its totient is φ = 382812910920.

The previous prime is 1200640497061. The next prime is 1200640497097. The reversal of 1200640497066 is 6607940460021.

It is not an unprimeable number, because it can be changed into a prime (1200640497061) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 161112820 + ... + 161120271.

Almost surely, 2^{1200640497066} is an apocalyptic number.

1200640497066 is an abundant number, since it is smaller than the sum of its proper divisors (1606654200438).

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

1200640497066 is a wasteful number, since it uses less digits than its factorization.

1200640497066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322233128 (or 322233119 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 1200640497066 in words is "one trillion, two hundred billion, six hundred forty million, four hundred ninety-seven thousand, sixty-six".