61605020000 has 60 divisors (see below), whose sum is σ = 151557639156. Its totient is φ = 24642000000.

The previous prime is 61605019981. The next prime is 61605020011. The reversal of 61605020000 is 2050616.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1520126 + ... + 1560125.

Almost surely, 2^61605020000 is an apocalyptic number.

It is an amenable number.

61605020000 is an abundant number, since it is smaller than the sum of its proper divisors (89952619156).

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

61605020000 is an equidigital number, since it uses as much as digits as its factorization.

61605020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3080281 (or 3080258 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 61605020000 its reverse (2050616), we get a palindrome (61607070616).

It can be divided in two parts, 616050 and 20000, that multiplied together give a square (12321000000 = 111000²).

The spelling of 61605020000 in words is "sixty-one billion, six hundred five million, twenty thousand".