61650020102 has 32 divisors (see below), whose sum is σ = 101517940224. Its totient is φ = 27846597600.

The previous prime is 61650020093. The next prime is 61650020143. The reversal of 61650020102 is 20102005616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2271452 + ... + 2298432.

It is an arithmetic number, because the mean of its divisors is an integer number (3172435632).

Almost surely, 2^61650020102 is an apocalyptic number.

61650020102 is a deficient number, since it is larger than the sum of its proper divisors (39867920122).

61650020102 is a wasteful number, since it uses less digits than its factorization.

61650020102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27644.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 61650020102 its reverse (20102005616), we get a palindrome (81752025718).

The spelling of 61650020102 in words is "sixty-one billion, six hundred fifty million, twenty thousand, one hundred two".