61765422420 has 48 divisors (see below), whose sum is σ = 186246506880. Its totient is φ = 15203796096.

The previous prime is 61765422419. The next prime is 61765422461. The reversal of 61765422420 is 2422456716.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 39592440 + ... + 39593999.

It is an arithmetic number, because the mean of its divisors is an integer number (3880135560).

Almost surely, 2^61765422420 is an apocalyptic number.

61765422420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61765422420 is an abundant number, since it is smaller than the sum of its proper divisors (124481084460).

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

61765422420 is a wasteful number, since it uses less digits than its factorization.

61765422420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79186464 (or 79186462 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 39.

The spelling of 61765422420 in words is "sixty-one billion, seven hundred sixty-five million, four hundred twenty-two thousand, four hundred twenty".