88570478393721 has 9 divisors (see below), whose sum is σ = 127935176239429. Its totient is φ = 59046966773436.

The previous prime is 88570478393671. The next prime is 88570478393737. The reversal of 88570478393721 is 12739387407588.

The square root of 88570478393721 is 9411189.

It is a perfect power (a square), and thus also a powerful number.

88570478393721 is a `hidden beast` number, since 8 + 8 + 5 + 70 + 478 + 39 + 37 + 21 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is a de Polignac number, because none of the positive numbers 2^k-88570478393721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 88570478393721.

It is not an unprimeable number, because it can be changed into a prime (88570478393021) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 26665036 + ... + 29802098.

Almost surely, 2^{88570478393721} is an apocalyptic number.

88570478393721 is the 9411189-th square number.

88570478393721 is the 4705595-th centered octagonal number.

It is an amenable number.

88570478393721 is a deficient number, since it is larger than the sum of its proper divisors (39364697845708).

88570478393721 is an frugal number, since it uses more digits than its factorization.

88570478393721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6274132 (or 3137066 counting only the distinct ones).

The product of its (nonzero) digits is 568995840, while the sum is 72.

The spelling of 88570478393721 in words is "eighty-eight trillion, five hundred seventy billion, four hundred seventy-eight million, three hundred ninety-three thousand, seven hundred twenty-one".