61020172252 has 24 divisors (see below), whose sum is σ = 115680042800. Its totient is φ = 28163152368.

The previous prime is 61020172223. The next prime is 61020172253. The reversal of 61020172252 is 25227102016.

It is a super-2 number, since 2×61020172252² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61020172252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61020172253) 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, 3463002 + ... + 3480577.

Almost surely, 2^61020172252 is an apocalyptic number.

It is an amenable number.

61020172252 is a deficient number, since it is larger than the sum of its proper divisors (54659870548).

61020172252 is a wasteful number, since it uses less digits than its factorization.

61020172252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6943622 (or 6943594 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

Adding to 61020172252 its reverse (25227102016), we get a palindrome (86247274268).

The spelling of 61020172252 in words is "sixty-one billion, twenty million, one hundred seventy-two thousand, two hundred fifty-two".