61172233390 has 32 divisors (see below), whose sum is σ = 117425881440. Its totient is φ = 22863857664.

The previous prime is 61172233387. The next prime is 61172233391. The reversal of 61172233390 is 9333227116.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61172233391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1270747 + ... + 1318006.

It is an arithmetic number, because the mean of its divisors is an integer number (3669558795).

Almost surely, 2^61172233390 is an apocalyptic number.

61172233390 is a deficient number, since it is larger than the sum of its proper divisors (56253648050).

61172233390 is a wasteful number, since it uses less digits than its factorization.

61172233390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588916.

The product of its (nonzero) digits is 40824, while the sum is 37.

The spelling of 61172233390 in words is "sixty-one billion, one hundred seventy-two million, two hundred thirty-three thousand, three hundred ninety".