61554402 has 48 divisors (see below), whose sum is σ = 164149440. Its totient is φ = 16233696.

The previous prime is 61554401. The next prime is 61554413. The reversal of 61554402 is 20445516.

61554402 is a `hidden beast` number, since 615 + 5 + 4 + 40 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (61554401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17152 + ... + 20427.

It is an arithmetic number, because the mean of its divisors is an integer number (3419780).

Almost surely, 2^61554402 is an apocalyptic number.

61554402 is an abundant number, since it is smaller than the sum of its proper divisors (102595038).

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

61554402 is a wasteful number, since it uses less digits than its factorization.

61554402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37607 (or 37604 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 61554402 is about 7845.6613487965. The cubic root of 61554402 is about 394.8386928815.

Adding to 61554402 its reverse (20445516), we get a palindrome (81999918).

The spelling of 61554402 in words is "sixty-one million, five hundred fifty-four thousand, four hundred two".