27951202957 has 4 divisors (see below), whose sum is σ = 27953345376. Its totient is φ = 27949060540.

The previous prime is 27951202897. The next prime is 27951202969. The reversal of 27951202957 is 75920215972.

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 27951202957 - 2¹¹ = 27951200909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27951202957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27951202997) 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, 1051519 + ... + 1077772.

It is an arithmetic number, because the mean of its divisors is an integer number (6988336344).

Almost surely, 2^27951202957 is an apocalyptic number.

It is an amenable number.

27951202957 is a deficient number, since it is larger than the sum of its proper divisors (2142419).

27951202957 is a wasteful number, since it uses less digits than its factorization.

27951202957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142418.

The product of its (nonzero) digits is 793800, while the sum is 49.

The spelling of 27951202957 in words is "twenty-seven billion, nine hundred fifty-one million, two hundred two thousand, nine hundred fifty-seven".