97789211520 has 2048 divisors, whose sum is σ = 460155064320. Its totient is φ = 16986931200.

The previous prime is 97789211501. The next prime is 97789211521. The reversal of 97789211520 is 2511298779.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97789211521) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 1339578204 + ... + 1339578276.

It is an arithmetic number, because the mean of its divisors is an integer number (224685090).

Almost surely, 2^97789211520 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 97789211520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230077532160).

97789211520 is an abundant number, since it is smaller than the sum of its proper divisors (362365852800).

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

97789211520 is a wasteful number, since it uses less digits than its factorization.

97789211520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 51.

The spelling of 97789211520 in words is "ninety-seven billion, seven hundred eighty-nine million, two hundred eleven thousand, five hundred twenty".