612506144 has 12 divisors (see below), whose sum is σ = 1205871534. Its totient is φ = 306253056.

The previous prime is 612506143. The next prime is 612506171. The reversal of 612506144 is 441605216.

It can be written as a sum of positive squares in only one way, i.e., 511302544 + 101203600 = 22612^2 + 10060^2 .

It is not an unprimeable number, because it can be changed into a prime (612506143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9570377 + ... + 9570440.

Almost surely, 2^612506144 is an apocalyptic number.

It is an amenable number.

612506144 is a deficient number, since it is larger than the sum of its proper divisors (593365390).

612506144 is a wasteful number, since it uses less digits than its factorization.

612506144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19140827 (or 19140819 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 612506144 is about 24748.8614687626. The cubic root of 612506144 is about 849.2524657249.

The spelling of 612506144 in words is "six hundred twelve million, five hundred six thousand, one hundred forty-four".