611161550 has 48 divisors (see below), whose sum is σ = 1165987872. Its totient is φ = 238243200.

The previous prime is 611161541. The next prime is 611161553. The reversal of 611161550 is 55161116.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611161553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 441860 + ... + 443240.

It is an arithmetic number, because the mean of its divisors is an integer number (24291414).

Almost surely, 2^611161550 is an apocalyptic number.

611161550 is a deficient number, since it is larger than the sum of its proper divisors (554826322).

611161550 is a wasteful number, since it uses less digits than its factorization.

611161550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613 (or 1608 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 611161550 is about 24721.6817793612. The cubic root of 611161550 is about 848.6305746192.

It can be divided in two parts, 61 and 1161550, that added together give a palindrome (1161611).

The spelling of 611161550 in words is "six hundred eleven million, one hundred sixty-one thousand, five hundred fifty".