61210250550 has 72 divisors (see below), whose sum is σ = 165652082856. Its totient is φ = 16203573120.

The previous prime is 61210250539. The next prime is 61210250593. The reversal of 61210250550 is 5505201216.

61210250550 is a `hidden beast` number, since 6 + 1 + 2 + 102 + 5 + 0 + 550 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 434784 + ... + 558083.

It is an arithmetic number, because the mean of its divisors is an integer number (2300723373).

Almost surely, 2^61210250550 is an apocalyptic number.

61210250550 is an abundant number, since it is smaller than the sum of its proper divisors (104441832306).

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

61210250550 is a wasteful number, since it uses less digits than its factorization.

61210250550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993022 (or 993014 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 61210250550 its reverse (5505201216), we get a palindrome (66715451766).

The spelling of 61210250550 in words is "sixty-one billion, two hundred ten million, two hundred fifty thousand, five hundred fifty".