61540413460 has 12 divisors (see below), whose sum is σ = 129234868308. Its totient is φ = 24616165376.

The previous prime is 61540413443. The next prime is 61540413469. The reversal of 61540413460 is 6431404516.

It can be written as a sum of positive squares in 2 ways, for example, as 20708936836 + 40831476624 = 143906^2 + 202068^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61540413469) 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, 1538510317 + ... + 1538510356.

It is an arithmetic number, because the mean of its divisors is an integer number (10769572359).

Almost surely, 2^61540413460 is an apocalyptic number.

It is an amenable number.

61540413460 is an abundant number, since it is smaller than the sum of its proper divisors (67694454848).

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

61540413460 is a wasteful number, since it uses less digits than its factorization.

61540413460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3077020682 (or 3077020680 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 61540413460 its reverse (6431404516), we get a palindrome (67971817976).

The spelling of 61540413460 in words is "sixty-one billion, five hundred forty million, four hundred thirteen thousand, four hundred sixty".