61220164332 has 96 divisors (see below), whose sum is σ = 149682975232. Its totient is φ = 19455676416.

The previous prime is 61220164319. The next prime is 61220164361. The reversal of 61220164332 is 23346102216.

It is a self number, because there is not a number n which added to its sum of digits gives 61220164332.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5736033 + ... + 5746695.

Almost surely, 2^61220164332 is an apocalyptic number.

It is an amenable number.

61220164332 is an abundant number, since it is smaller than the sum of its proper divisors (88462810900).

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

61220164332 is a wasteful number, since it uses less digits than its factorization.

61220164332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10967 (or 10965 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 61220164332 its reverse (23346102216), we get a palindrome (84566266548).

The spelling of 61220164332 in words is "sixty-one billion, two hundred twenty million, one hundred sixty-four thousand, three hundred thirty-two".