201638944737916 has 48 divisors (see below), whose sum is σ = 427193947143936. Its totient is φ = 81296436075264.

The previous prime is 201638944737869. The next prime is 201638944737991. The reversal of 201638944737916 is 619737449836102.

It is a Smith number, since the sum of its digits (70) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95095546 + ... + 97192801.

It is an arithmetic number, because the mean of its divisors is an integer number (8899873898832).

Almost surely, 2^{201638944737916} is an apocalyptic number.

It is an amenable number.

201638944737916 is an abundant number, since it is smaller than the sum of its proper divisors (225555002406020).

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

201638944737916 is a wasteful number, since it uses less digits than its factorization.

201638944737916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192290578 (or 192290576 counting only the distinct ones).

The product of its (nonzero) digits is 329204736, while the sum is 70.

The spelling of 201638944737916 in words is "two hundred one trillion, six hundred thirty-eight billion, nine hundred forty-four million, seven hundred thirty-seven thousand, nine hundred sixteen".