25150042987 has 4 divisors (see below), whose sum is σ = 26473729480. Its totient is φ = 23826356496.

The previous prime is 25150042961. The next prime is 25150042997. The reversal of 25150042987 is 78924005152.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25150042987 - 2⁷ = 25150042859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25150042937) 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, 661843218 + ... + 661843255.

It is an arithmetic number, because the mean of its divisors is an integer number (6618432370).

Almost surely, 2^25150042987 is an apocalyptic number.

25150042987 is a deficient number, since it is larger than the sum of its proper divisors (1323686493).

25150042987 is a wasteful number, since it uses less digits than its factorization.

25150042987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323686492.

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 25150042987 in words is "twenty-five billion, one hundred fifty million, forty-two thousand, nine hundred eighty-seven".