611401560 has 128 divisors (see below), whose sum is σ = 2286835200. Its totient is φ = 127042560.

The previous prime is 611401559. The next prime is 611401631. The reversal of 611401560 is 65104116.

611401560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 611401560.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23845 + ... + 42324.

It is an arithmetic number, because the mean of its divisors is an integer number (17865900).

Almost surely, 2^611401560 is an apocalyptic number.

611401560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

611401560 is an abundant number, since it is smaller than the sum of its proper divisors (1675433640).

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

611401560 is a wasteful number, since it uses less digits than its factorization.

611401560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66201 (or 66197 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 611401560 is about 24726.5355438242. The cubic root of 611401560 is about 848.7416489975.

Adding to 611401560 its reverse (65104116), we get a palindrome (676505676).

The spelling of 611401560 in words is "six hundred eleven million, four hundred one thousand, five hundred sixty".