612127640 has 16 divisors (see below), whose sum is σ = 1377287280. Its totient is φ = 244851040.

The previous prime is 612127639. The next prime is 612127657. The reversal of 612127640 is 46721216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7651556 + ... + 7651635.

It is an arithmetic number, because the mean of its divisors is an integer number (86080455).

Almost surely, 2^612127640 is an apocalyptic number.

It is an amenable number.

612127640 is an abundant number, since it is smaller than the sum of its proper divisors (765159640).

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

612127640 is a wasteful number, since it uses less digits than its factorization.

612127640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15303202 (or 15303198 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 612127640 is about 24741.2133898077. The cubic root of 612127640 is about 849.0774951309.

Adding to 612127640 its reverse (46721216), we get a palindrome (658848856).

The spelling of 612127640 in words is "six hundred twelve million, one hundred twenty-seven thousand, six hundred forty".