61121800152 has 64 divisors (see below), whose sum is σ = 194037465600. Its totient is φ = 17463371040.

The previous prime is 61121800127. The next prime is 61121800241. The reversal of 61121800152 is 25100812116.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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, 20210724 + ... + 20213747.

It is an arithmetic number, because the mean of its divisors is an integer number (3031835400).

Almost surely, 2^61121800152 is an apocalyptic number.

It is an amenable number.

61121800152 is an abundant number, since it is smaller than the sum of its proper divisors (132915665448).

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

61121800152 is a wasteful number, since it uses less digits than its factorization.

61121800152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40424493 (or 40424483 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The spelling of 61121800152 in words is "sixty-one billion, one hundred twenty-one million, eight hundred thousand, one hundred fifty-two".