61061660551672 has 16 divisors (see below), whose sum is σ = 124898851128600. Its totient is φ = 27755300250720.

The previous prime is 61061660551637. The next prime is 61061660551673. The reversal of 61061660551672 is 27615506616016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61061660551673) 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, 346941253047 + ... + 346941253222.

Almost surely, 2^{61061660551672} is an apocalyptic number.

It is an amenable number.

61061660551672 is an abundant number, since it is smaller than the sum of its proper divisors (63837190576928).

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

61061660551672 is a wasteful number, since it uses less digits than its factorization.

61061660551672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693882506286 (or 693882506282 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 61061660551672 in words is "sixty-one trillion, sixty-one billion, six hundred sixty million, five hundred fifty-one thousand, six hundred seventy-two".