421142197077780 has 384 divisors, whose sum is σ = 1301529212928000. Its totient is φ = 101272495693824.

The previous prime is 421142197077761. The next prime is 421142197077821. The reversal of 421142197077780 is 87770791241124.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2958904977 + ... + 2959047303.

It is an arithmetic number, because the mean of its divisors is an integer number (3389398992000).

Almost surely, 2^{421142197077780} 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 421142197077780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (650764606464000).

421142197077780 is an abundant number, since it is smaller than the sum of its proper divisors (880387015850220).

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

421142197077780 is a wasteful number, since it uses less digits than its factorization.

421142197077780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143151 (or 143149 counting only the distinct ones).

The product of its (nonzero) digits is 11063808, while the sum is 60.

The spelling of 421142197077780 in words is "four hundred twenty-one trillion, one hundred forty-two billion, one hundred ninety-seven million, seventy-seven thousand, seven hundred eighty".