61032261440 has 28 divisors (see below), whose sum is σ = 145333073316. Its totient is φ = 24412904448.

The previous prime is 61032261439. The next prime is 61032261443. The reversal of 61032261440 is 4416223016.

61032261440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 40813696576 + 20218564864 = 202024^2 + 142192^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61032261443) 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, 95362589 + ... + 95363228.

Almost surely, 2^61032261440 is an apocalyptic number.

It is an amenable number.

61032261440 is an abundant number, since it is smaller than the sum of its proper divisors (84300811876).

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

61032261440 is a wasteful number, since it uses less digits than its factorization.

61032261440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190725834 (or 190725824 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 61032261440 its reverse (4416223016), we get a palindrome (65448484456).

The spelling of 61032261440 in words is "sixty-one billion, thirty-two million, two hundred sixty-one thousand, four hundred forty".