61611040 has 24 divisors (see below), whose sum is σ = 145556460. Its totient is φ = 24644352.

The previous prime is 61611029. The next prime is 61611041. The reversal of 61611040 is 4011616.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 61027344 + 583696 = 7812^2 + 764^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61610999 and 61611017.

It is not an unprimeable number, because it can be changed into a prime (61611041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192375 + ... + 192694.

Almost surely, 2^61611040 is an apocalyptic number.

It is an amenable number.

61611040 is an abundant number, since it is smaller than the sum of its proper divisors (83945420).

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

61611040 is a wasteful number, since it uses less digits than its factorization.

61611040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385084 (or 385076 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 61611040 is about 7849.2700297544. The cubic root of 61611040 is about 394.9597566222.

Adding to 61611040 its reverse (4011616), we get a palindrome (65622656).

The spelling of 61611040 in words is "sixty-one million, six hundred eleven thousand, forty".