61747822140 has 24 divisors (see below), whose sum is σ = 172893902160. Its totient is φ = 16466085888.

The previous prime is 61747822111. The next prime is 61747822153. The reversal of 61747822140 is 4122874716.

It is a junction number, because it is equal to n+sod(n) for n = 61747822092 and 61747822101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514565125 + ... + 514565244.

It is an arithmetic number, because the mean of its divisors is an integer number (7203912590).

Almost surely, 2^61747822140 is an apocalyptic number.

61747822140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61747822140 is an abundant number, since it is smaller than the sum of its proper divisors (111146080020).

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

61747822140 is a wasteful number, since it uses less digits than its factorization.

61747822140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029130381 (or 1029130379 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The spelling of 61747822140 in words is "sixty-one billion, seven hundred forty-seven million, eight hundred twenty-two thousand, one hundred forty".