54278157987 has 24 divisors (see below), whose sum is σ = 79628230656. Its totient is φ = 35620150896.

The previous prime is 54278157971. The next prime is 54278158019. The reversal of 54278157987 is 78975187245.

54278157987 is a `hidden beast` number, since 5 + 427 + 81 + 57 + 9 + 87 = 666.

It is not a de Polignac number, because 54278157987 - 2⁴ = 54278157971 is a prime.

It is a super-2 number, since 2×54278157987² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (54278157937) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 841438 + ... + 903644.

It is an arithmetic number, because the mean of its divisors is an integer number (3317842944).

Almost surely, 2^54278157987 is an apocalyptic number.

54278157987 is a deficient number, since it is larger than the sum of its proper divisors (25350072669).

54278157987 is a wasteful number, since it uses less digits than its factorization.

54278157987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63727 (or 63724 counting only the distinct ones).

The product of its digits is 39513600, while the sum is 63.

The spelling of 54278157987 in words is "fifty-four billion, two hundred seventy-eight million, one hundred fifty-seven thousand, nine hundred eighty-seven".