61061031222920 has 32 divisors (see below), whose sum is σ = 141100491072600. Its totient is φ = 23764293232128.

The previous prime is 61061031222791. The next prime is 61061031222929. The reversal of 61061031222920 is 2922213016016.

It can be written as a sum of positive squares in 4 ways, for example, as 59767093122724 + 1293938100196 = 7730918^2 + 1137514^2 .

It is a super-2 number, since 2×61061031222920² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61061031222929) 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, 20628725285 + ... + 20628728244.

Almost surely, 2^{61061031222920} is an apocalyptic number.

It is an amenable number.

61061031222920 is an abundant number, since it is smaller than the sum of its proper divisors (80039459849680).

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

61061031222920 is a wasteful number, since it uses less digits than its factorization.

61061031222920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41257453577 (or 41257453573 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

Adding to 61061031222920 its reverse (2922213016016), we get a palindrome (63983244238936).

The spelling of 61061031222920 in words is "sixty-one trillion, sixty-one billion, thirty-one million, two hundred twenty-two thousand, nine hundred twenty".