61172944450 has 12 divisors (see below), whose sum is σ = 113781676770. Its totient is φ = 24469177760.

The previous prime is 61172944403. The next prime is 61172944463. The reversal of 61172944450 is 5444927116.

It can be written as a sum of positive squares in 3 ways, for example, as 55676649681 + 5496294769 = 235959^2 + 74137^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61172944397 and 61172944406.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 611729395 + ... + 611729494.

Almost surely, 2^61172944450 is an apocalyptic number.

61172944450 is a deficient number, since it is larger than the sum of its proper divisors (52608732320).

61172944450 is a wasteful number, since it uses less digits than its factorization.

61172944450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223458901 (or 1223458896 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 61172944450 in words is "sixty-one billion, one hundred seventy-two million, nine hundred forty-four thousand, four hundred fifty".