61550323360020 has 144 divisors (see below), whose sum is σ = 204549761287872. Its totient is φ = 14857250526720.

The previous prime is 61550323359949. The next prime is 61550323360037. The reversal of 61550323360020 is 2006332305516.

61550323360020 is a `hidden beast` number, since 6 + 1 + 5 + 5 + 0 + 3 + 23 + 3 + 600 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66246862 + ... + 67169541.

It is an arithmetic number, because the mean of its divisors is an integer number (1420484453388).

Almost surely, 2^{61550323360020} is an apocalyptic number.

61550323360020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61550323360020 is an abundant number, since it is smaller than the sum of its proper divisors (142999437927852).

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

61550323360020 is a wasteful number, since it uses less digits than its factorization.

61550323360020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133416662 (or 133416657 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 36.

Adding to 61550323360020 its reverse (2006332305516), we get a palindrome (63556655665536).

The spelling of 61550323360020 in words is "sixty-one trillion, five hundred fifty billion, three hundred twenty-three million, three hundred sixty thousand, twenty".