61372945620 has 384 divisors, whose sum is σ = 233868902400. Its totient is φ = 13054846464.

The previous prime is 61372945619. The next prime is 61372945661. The reversal of 61372945620 is 2654927316.

61372945620 is a `hidden beast` number, since 6 + 13 + 7 + 2 + 9 + 4 + 5 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3207241 + ... + 3226319.

It is an arithmetic number, because the mean of its divisors is an integer number (609033600).

Almost surely, 2^61372945620 is an apocalyptic number.

61372945620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61372945620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116934451200).

61372945620 is an abundant number, since it is smaller than the sum of its proper divisors (172495956780).

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

61372945620 is a wasteful number, since it uses less digits than its factorization.

61372945620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19164 (or 19156 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 61372945620 in words is "sixty-one billion, three hundred seventy-two million, nine hundred forty-five thousand, six hundred twenty".