2861249152545 has 64 divisors (see below), whose sum is σ = 5835952074240. Its totient is φ = 1302910009344.

The previous prime is 2861249152519. The next prime is 2861249152547. The reversal of 2861249152545 is 5452519421682.

It is a happy number.

2861249152545 is a `hidden beast` number, since 2 + 8 + 6 + 1 + 2 + 4 + 91 + 5 + 2 + 545 = 666.

2861249152545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2861249152545 - 2³⁶ = 2792529675809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2861249152491 and 2861249152500.

It is not an unprimeable number, because it can be changed into a prime (2861249152547) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5647752 + ... + 6133481.

It is an arithmetic number, because the mean of its divisors is an integer number (91186751160).

Almost surely, 2^{2861249152545} is an apocalyptic number.

It is an amenable number.

2861249152545 is an abundant number, since it is smaller than the sum of its proper divisors (2974702921695).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2861249152545 is a wasteful number, since it uses less digits than its factorization.

2861249152545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11781511 (or 11781505 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 54.

The spelling of 2861249152545 in words is "two trillion, eight hundred sixty-one billion, two hundred forty-nine million, one hundred fifty-two thousand, five hundred forty-five".