2135749761944 has 8 divisors (see below), whose sum is σ = 4004530803660. Its totient is φ = 1067874880968.

The previous prime is 2135749761911. The next prime is 2135749761953. The reversal of 2135749761944 is 4491679475312.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×2135749761944² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133484360114 + ... + 133484360129.

Almost surely, 2^{2135749761944} is an apocalyptic number.

It is an amenable number.

2135749761944 is a deficient number, since it is larger than the sum of its proper divisors (1868781041716).

2135749761944 is a wasteful number, since it uses less digits than its factorization.

2135749761944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266968720249 (or 266968720245 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 62.

The spelling of 2135749761944 in words is "two trillion, one hundred thirty-five billion, seven hundred forty-nine million, seven hundred sixty-one thousand, nine hundred forty-four".