61686890934652 has 24 divisors (see below), whose sum is σ = 108028987367616. Its totient is φ = 30821472410688.

The previous prime is 61686890934637. The next prime is 61686890934659. The reversal of 61686890934652 is 25643909868616.

61686890934652 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61686890934652² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61686890934659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37687933 + ... + 39290635.

It is an arithmetic number, because the mean of its divisors is an integer number (4501207806984).

Almost surely, 2^{61686890934652} is an apocalyptic number.

It is an amenable number.

61686890934652 is a deficient number, since it is larger than the sum of its proper divisors (46342096432964).

61686890934652 is a wasteful number, since it uses less digits than its factorization.

61686890934652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1609557 (or 1609555 counting only the distinct ones).

The product of its (nonzero) digits is 806215680, while the sum is 73.

The spelling of 61686890934652 in words is "sixty-one trillion, six hundred eighty-six billion, eight hundred ninety million, nine hundred thirty-four thousand, six hundred fifty-two".