27869551542 has 72 divisors (see below), whose sum is σ = 70451831736. Its totient is φ = 7939016064.

The previous prime is 27869551537. The next prime is 27869551547. The reversal of 27869551542 is 24515596872.

27869551542 is a `hidden beast` number, since 2 + 7 + 8 + 6 + 95 + 5 + 1 + 542 = 666.

It is an interprime number because it is at equal distance from previous prime (27869551537) and next prime (27869551547).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27869551547) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 250353 + ... + 344115.

It is an arithmetic number, because the mean of its divisors is an integer number (978497663).

Almost surely, 2^27869551542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27869551542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35225915868).

27869551542 is an abundant number, since it is smaller than the sum of its proper divisors (42582280194).

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

27869551542 is a wasteful number, since it uses less digits than its factorization.

27869551542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94122 (or 94112 counting only the distinct ones).

The product of its digits is 6048000, while the sum is 54.

The spelling of 27869551542 in words is "twenty-seven billion, eight hundred sixty-nine million, five hundred fifty-one thousand, five hundred forty-two".