1973732397780 has 384 divisors, whose sum is σ = 6682742341632. Its totient is φ = 428843520000.

The previous prime is 1973732397779. The next prime is 1973732397787. The reversal of 1973732397780 is 877932373791.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1973732397787) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 74212285 + ... + 74238875.

It is an arithmetic number, because the mean of its divisors is an integer number (17402974848).

Almost surely, 2^{1973732397780} is an apocalyptic number.

1973732397780 is a gapful number since it is divisible by the number (10) 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 1973732397780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3341371170816).

1973732397780 is an abundant number, since it is smaller than the sum of its proper divisors (4709009943852).

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

1973732397780 is a wasteful number, since it uses less digits than its factorization.

1973732397780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26879 (or 26877 counting only the distinct ones).

The product of its (nonzero) digits is 84015792, while the sum is 66.

The spelling of 1973732397780 in words is "one trillion, nine hundred seventy-three billion, seven hundred thirty-two million, three hundred ninety-seven thousand, seven hundred eighty".