1649987418780 has 96 divisors (see below), whose sum is σ = 5258496559680. Its totient is φ = 429265013760.

The previous prime is 1649987418731. The next prime is 1649987418847. The reversal of 1649987418780 is 878147899461.

1649987418780 is a `hidden beast` number, since 1 + 6 + 49 + 98 + 7 + 418 + 7 + 80 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1649987418699 and 1649987418708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37240449 + ... + 37284728.

It is an arithmetic number, because the mean of its divisors is an integer number (54776005830).

Almost surely, 2^{1649987418780} is an apocalyptic number.

1649987418780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1649987418780 is an abundant number, since it is smaller than the sum of its proper divisors (3608509140900).

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

1649987418780 is a wasteful number, since it uses less digits than its factorization.

1649987418780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74525236 (or 74525228 counting only the distinct ones).

The product of its (nonzero) digits is 195084288, while the sum is 72.

The spelling of 1649987418780 in words is "one trillion, six hundred forty-nine billion, nine hundred eighty-seven million, four hundred eighteen thousand, seven hundred eighty".