82621620560 has 40 divisors (see below), whose sum is σ = 192198505056. Its totient is φ = 33030887040.

The previous prime is 82621620551. The next prime is 82621620583. The reversal of 82621620560 is 6502612628.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×82621620560² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127226 + ... + 425945.

Almost surely, 2^82621620560 is an apocalyptic number.

82621620560 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

82621620560 is an abundant number, since it is smaller than the sum of its proper divisors (109576884496).

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

82621620560 is a wasteful number, since it uses less digits than its factorization.

82621620560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555051 (or 555045 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 82621620560 in words is "eighty-two billion, six hundred twenty-one million, six hundred twenty thousand, five hundred sixty".