1649166640550 has 48 divisors (see below), whose sum is σ = 3603717441072. Its totient is φ = 553566422400.

The previous prime is 1649166640529. The next prime is 1649166640571. The reversal of 1649166640550 is 550466619461.

It is an interprime number because it is at equal distance from previous prime (1649166640529) and next prime (1649166640571).

It is a junction number, because it is equal to n+sod(n) for n = 1649166640492 and 1649166640501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115319189 + ... + 115333488.

It is an arithmetic number, because the mean of its divisors is an integer number (75077446689).

Almost surely, 2^{1649166640550} is an apocalyptic number.

1649166640550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1649166640550 is an abundant number, since it is smaller than the sum of its proper divisors (1954550800522).

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

1649166640550 is a wasteful number, since it uses less digits than its factorization.

1649166640550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230652713 (or 230652708 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 53.

The spelling of 1649166640550 in words is "one trillion, six hundred forty-nine billion, one hundred sixty-six million, six hundred forty thousand, five hundred fifty".