1636406506320 has 160 divisors (see below), whose sum is σ = 5173177895424. Its totient is φ = 427825881600.

The previous prime is 1636406506303. The next prime is 1636406506337. The reversal of 1636406506320 is 236056046361.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1636406506303) and next prime (1636406506337).

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, 2295975 + ... + 2923065.

Almost surely, 2^{1636406506320} is an apocalyptic number.

1636406506320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1636406506320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2586588947712).

1636406506320 is an abundant number, since it is smaller than the sum of its proper divisors (3536771389104).

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

1636406506320 is a wasteful number, since it uses less digits than its factorization.

1636406506320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627321 (or 627315 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 42.

The spelling of 1636406506320 in words is "one trillion, six hundred thirty-six billion, four hundred six million, five hundred six thousand, three hundred twenty".