1601211500650 has 12 divisors (see below), whose sum is σ = 2978253391302. Its totient is φ = 640484600240.

The previous prime is 1601211500597. The next prime is 1601211500653. The reversal of 1601211500650 is 560051121061.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 767812310001 + 833399190649 = 876249^2 + 912907^2 .

It is not an unprimeable number, because it can be changed into a prime (1601211500653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16012114957 + ... + 16012115056.

Almost surely, 2^{1601211500650} is an apocalyptic number.

1601211500650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1601211500650 is a deficient number, since it is larger than the sum of its proper divisors (1377041890652).

1601211500650 is a wasteful number, since it uses less digits than its factorization.

1601211500650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32024230025 (or 32024230020 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

The spelling of 1601211500650 in words is "one trillion, six hundred one billion, two hundred eleven million, five hundred thousand, six hundred fifty".