2161252240652 has 18 divisors (see below), whose sum is σ = 3953784230508. Its totient is φ = 1033642374952.

The previous prime is 2161252240633. The next prime is 2161252240691. The reversal of 2161252240652 is 2560422521612.

It is a super-2 number, since 2×2161252240652² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 510690758 + ... + 510694989.

Almost surely, 2^{2161252240652} is an apocalyptic number.

It is an amenable number.

2161252240652 is a deficient number, since it is larger than the sum of its proper divisors (1792531989856).

2161252240652 is a wasteful number, since it uses less digits than its factorization.

2161252240652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021385797 (or 1021385772 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 2161252240652 in words is "two trillion, one hundred sixty-one billion, two hundred fifty-two million, two hundred forty thousand, six hundred fifty-two".