27144625640 has 64 divisors (see below), whose sum is σ = 68252829120. Its totient is φ = 9630016000.

The previous prime is 27144625631. The next prime is 27144625649. The reversal of 27144625640 is 4652644172.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (27144625631) and next prime (27144625649).

It is a super-2 number, since 2×27144625640² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (27144625649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 734306 + ... + 770385.

It is an arithmetic number, because the mean of its divisors is an integer number (1066450455).

Almost surely, 2^27144625640 is an apocalyptic number.

27144625640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27144625640 is an abundant number, since it is smaller than the sum of its proper divisors (41108203480).

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

27144625640 is a wasteful number, since it uses less digits than its factorization.

27144625640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504754 (or 1504750 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 41.

The spelling of 27144625640 in words is "twenty-seven billion, one hundred forty-four million, six hundred twenty-five thousand, six hundred forty".