2601861042501 has 96 divisors (see below), whose sum is σ = 4591708160000. Its totient is φ = 1417338790560.

The previous prime is 2601861042479. The next prime is 2601861042509. The reversal of 2601861042501 is 1052401681062.

It is a happy number.

2601861042501 is a `hidden beast` number, since 2 + 6 + 0 + 18 + 610 + 4 + 25 + 0 + 1 = 666.

It is not a de Polignac number, because 2601861042501 - 2¹⁰ = 2601861041477 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 (2601861042509) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6208800 + ... + 6614598.

Almost surely, 2^{2601861042501} is an apocalyptic number.

2601861042501 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2601861042501 is a deficient number, since it is larger than the sum of its proper divisors (1989847117499).

2601861042501 is a wasteful number, since it uses less digits than its factorization.

2601861042501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405924 (or 405907 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 2601861042501 in words is "two trillion, six hundred one billion, eight hundred sixty-one million, forty-two thousand, five hundred one".