61651228446 has 24 divisors (see below), whose sum is σ = 133688930544. Its totient is φ = 20533291200.

The previous prime is 61651228423. The next prime is 61651228477. The reversal of 61651228446 is 64482215616.

It is a happy number.

61651228446 is a `hidden beast` number, since 6 + 16 + 512 + 2 + 84 + 46 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1404306 + ... + 1447541.

It is an arithmetic number, because the mean of its divisors is an integer number (5570372106).

Almost surely, 2^61651228446 is an apocalyptic number.

61651228446 is an abundant number, since it is smaller than the sum of its proper divisors (72037702098).

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

61651228446 is a wasteful number, since it uses less digits than its factorization.

61651228446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2853056 (or 2853053 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The spelling of 61651228446 in words is "sixty-one billion, six hundred fifty-one million, two hundred twenty-eight thousand, four hundred forty-six".