61206644540 has 48 divisors (see below), whose sum is σ = 128916443712. Its totient is φ = 24409921536.

The previous prime is 61206644539. The next prime is 61206644561. The reversal of 61206644540 is 4544660216.

It is a junction number, because it is equal to n+sod(n) for n = 61206644494 and 61206644503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10186217 + ... + 10192223.

It is an arithmetic number, because the mean of its divisors is an integer number (2685759244).

Almost surely, 2^61206644540 is an apocalyptic number.

It is an amenable number.

61206644540 is an abundant number, since it is smaller than the sum of its proper divisors (67709799172).

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

61206644540 is a wasteful number, since it uses less digits than its factorization.

61206644540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7446 (or 7444 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 61206644540 in words is "sixty-one billion, two hundred six million, six hundred forty-four thousand, five hundred forty".