61553433228 has 48 divisors (see below), whose sum is σ = 164164707840. Its totient is φ = 17584314624.

The previous prime is 61553433223. The next prime is 61553433229. The reversal of 61553433228 is 82233435516.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 61553433228.

It is not an unprimeable number, because it can be changed into a prime (61553433223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 629700 + ... + 720852.

It is an arithmetic number, because the mean of its divisors is an integer number (3420098080).

Almost surely, 2^61553433228 is an apocalyptic number.

It is an amenable number.

61553433228 is an abundant number, since it is smaller than the sum of its proper divisors (102611274612).

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

61553433228 is a wasteful number, since it uses less digits than its factorization.

61553433228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99206 (or 99204 counting only the distinct ones).

The product of its digits is 518400, while the sum is 42.

The spelling of 61553433228 in words is "sixty-one billion, five hundred fifty-three million, four hundred thirty-three thousand, two hundred twenty-eight".