51977420359620 has 192 divisors, whose sum is σ = 167458843238400. Its totient is φ = 11799774632448.

The previous prime is 51977420359597. The next prime is 51977420359637. The reversal of 51977420359620 is 2695302477915.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 874025127 + ... + 874084593.

It is an arithmetic number, because the mean of its divisors is an integer number (872181475200).

Almost surely, 2^{51977420359620} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51977420359620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83729421619200).

51977420359620 is an abundant number, since it is smaller than the sum of its proper divisors (115481422878780).

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

51977420359620 is a wasteful number, since it uses less digits than its factorization.

51977420359620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73602 (or 73600 counting only the distinct ones).

The product of its (nonzero) digits is 28576800, while the sum is 60.

The spelling of 51977420359620 in words is "fifty-one trillion, nine hundred seventy-seven billion, four hundred twenty million, three hundred fifty-nine thousand, six hundred twenty".