97521863670 has 192 divisors, whose sum is σ = 326321049600. Its totient is φ = 19610553600.

The previous prime is 97521863651. The next prime is 97521863671. The reversal of 97521863670 is 7636812579.

97521863670 is a `hidden beast` number, since 9 + 7 + 521 + 86 + 36 + 7 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97521863671) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12145 + ... + 441804.

It is an arithmetic number, because the mean of its divisors is an integer number (1699588800).

Almost surely, 2^97521863670 is an apocalyptic number.

97521863670 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 97521863670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163160524800).

97521863670 is an abundant number, since it is smaller than the sum of its proper divisors (228799185930).

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

97521863670 is a wasteful number, since it uses less digits than its factorization.

97521863670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454011 (or 454008 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

It can be divided in two parts, 97521 and 863670, that added together give a triangular number (961191 = T₁₃₈₆).

The spelling of 97521863670 in words is "ninety-seven billion, five hundred twenty-one million, eight hundred sixty-three thousand, six hundred seventy".