88661262720220 has 48 divisors (see below), whose sum is σ = 188972257386528. Its totient is φ = 34934320650240.

The previous prime is 88661262720209. The next prime is 88661262720221. The reversal of 88661262720220 is 2202726216688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88661262720221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54830500 + ... + 56424340.

It is an arithmetic number, because the mean of its divisors is an integer number (3936922028886).

Almost surely, 2^{88661262720220} is an apocalyptic number.

It is an amenable number.

88661262720220 is an abundant number, since it is smaller than the sum of its proper divisors (100310994666308).

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

88661262720220 is a wasteful number, since it uses less digits than its factorization.

88661262720220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635430 (or 1635428 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 52.

The spelling of 88661262720220 in words is "eighty-eight trillion, six hundred sixty-one billion, two hundred sixty-two million, seven hundred twenty thousand, two hundred twenty".