27977551915440 has 80 divisors (see below), whose sum is σ = 86835794796288. Its totient is φ = 7451615232768.

The previous prime is 27977551915427. The next prime is 27977551915463. The reversal of 27977551915440 is 4451915577972.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×27977551915440² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70624554 + ... + 71019593.

Almost surely, 2^{27977551915440} is an apocalyptic number.

27977551915440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27977551915440 is an abundant number, since it is smaller than the sum of its proper divisors (58858242880848).

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

27977551915440 is a wasteful number, since it uses less digits than its factorization.

27977551915440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141644986 (or 141644980 counting only the distinct ones).

The product of its (nonzero) digits is 111132000, while the sum is 66.

The spelling of 27977551915440 in words is "twenty-seven trillion, nine hundred seventy-seven billion, five hundred fifty-one million, nine hundred fifteen thousand, four hundred forty".