124649687887 has 4 divisors (see below), whose sum is σ = 124650425376. Its totient is φ = 124648950400.

The previous prime is 124649687857. The next prime is 124649687909. The reversal of 124649687887 is 788786946421.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124649687887 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 (124649687857) 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, 24762 + ... + 499912.

It is an arithmetic number, because the mean of its divisors is an integer number (31162606344).

Almost surely, 2^124649687887 is an apocalyptic number.

124649687887 is a deficient number, since it is larger than the sum of its proper divisors (737489).

124649687887 is an equidigital number, since it uses as much as digits as its factorization.

124649687887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737488.

The product of its digits is 260112384, while the sum is 70.

The spelling of 124649687887 in words is "one hundred twenty-four billion, six hundred forty-nine million, six hundred eighty-seven thousand, eight hundred eighty-seven".