61212733930 has 16 divisors (see below), whose sum is σ = 111157993224. Its totient is φ = 24268410880.

The previous prime is 61212733913. The next prime is 61212733931. The reversal of 61212733930 is 3933721216.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 51873251049 + 9339482881 = 227757^2 + 96641^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 61212733930.

It is not an unprimeable number, because it can be changed into a prime (61212733931) 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, 27084151 + ... + 27086410.

Almost surely, 2^61212733930 is an apocalyptic number.

61212733930 is a deficient number, since it is larger than the sum of its proper divisors (49945259294).

61212733930 is a wasteful number, since it uses less digits than its factorization.

61212733930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54170681.

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

The spelling of 61212733930 in words is "sixty-one billion, two hundred twelve million, seven hundred thirty-three thousand, nine hundred thirty".