52621909786 has 16 divisors (see below), whose sum is σ = 85834786536. Its totient is φ = 24093974016.

The previous prime is 52621909709. The next prime is 52621909787. The reversal of 52621909786 is 68790912625.

It can be written as a sum of positive squares in 4 ways, for example, as 49793691025 + 2828218761 = 223145^2 + 53181^2 .

It is not an unprimeable number, because it can be changed into a prime (52621909787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20913651 + ... + 20916166.

Almost surely, 2^52621909786 is an apocalyptic number.

52621909786 is a deficient number, since it is larger than the sum of its proper divisors (33212876750).

52621909786 is a wasteful number, since it uses less digits than its factorization.

52621909786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41829873.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 52621909786 in words is "fifty-two billion, six hundred twenty-one million, nine hundred nine thousand, seven hundred eighty-six".