2509861077361 has 4 divisors (see below), whose sum is σ = 2738030266224. Its totient is φ = 2281691888500.

The previous prime is 2509861077359. The next prime is 2509861077371. The reversal of 2509861077361 is 1637701689052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2509861077361 - 2¹ = 2509861077359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2509861077331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114084594415 + ... + 114084594436.

It is an arithmetic number, because the mean of its divisors is an integer number (684507566556).

Almost surely, 2^{2509861077361} is an apocalyptic number.

It is an amenable number.

2509861077361 is a deficient number, since it is larger than the sum of its proper divisors (228169188863).

2509861077361 is a wasteful number, since it uses less digits than its factorization.

2509861077361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228169188862.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 2509861077361 in words is "two trillion, five hundred nine billion, eight hundred sixty-one million, seventy-seven thousand, three hundred sixty-one".