61631425022212 has 6 divisors (see below), whose sum is σ = 107854993788878. Its totient is φ = 30815712511104.

The previous prime is 61631425022149. The next prime is 61631425022213. The reversal of 61631425022212 is 21222052413616.

It can be written as a sum of positive squares in only one way, i.e., 57139297374916 + 4492127647296 = 7559054^2 + 2119464^2 .

It is not an unprimeable number, because it can be changed into a prime (61631425022213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7703928127773 + ... + 7703928127780.

Almost surely, 2^{61631425022212} is an apocalyptic number.

It is an amenable number.

61631425022212 is a deficient number, since it is larger than the sum of its proper divisors (46223568766666).

61631425022212 is a wasteful number, since it uses less digits than its factorization.

61631425022212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15407856255557 (or 15407856255555 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

Adding to 61631425022212 its reverse (21222052413616), we get a palindrome (82853477435828).

The spelling of 61631425022212 in words is "sixty-one trillion, six hundred thirty-one billion, four hundred twenty-five million, twenty-two thousand, two hundred twelve".