2167661001501 has 12 divisors (see below), whose sum is σ = 3215689294012. Its totient is φ = 1406050379136.

The previous prime is 2167661001497. The next prime is 2167661001617. The reversal of 2167661001501 is 1051001667612.

It is a happy number.

2167661001501 is a `hidden beast` number, since 21 + 6 + 7 + 6 + 610 + 0 + 15 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1748662416900 + 418998584601 = 1322370^2 + 647301^2 .

It is not a de Polignac number, because 2167661001501 - 2² = 2167661001497 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2167661005501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3254745916 + ... + 3254746581.

Almost surely, 2^{2167661001501} is an apocalyptic number.

It is an amenable number.

2167661001501 is a deficient number, since it is larger than the sum of its proper divisors (1048028292511).

2167661001501 is a wasteful number, since it uses less digits than its factorization.

2167661001501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6509492540 (or 6509492537 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The spelling of 2167661001501 in words is "two trillion, one hundred sixty-seven billion, six hundred sixty-one million, one thousand, five hundred one".