61212665362100 has 144 divisors (see below), whose sum is σ = 164657679984000. Its totient is φ = 19270886092800.

The previous prime is 61212665362019. The next prime is 61212665362129. The reversal of 61212665362100 is 126356621216.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (41).

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, 62242850 + ... + 63218649.

It is an arithmetic number, because the mean of its divisors is an integer number (1143456111000).

Almost surely, 2^{61212665362100} is an apocalyptic number.

It is an amenable number.

61212665362100 is an abundant number, since it is smaller than the sum of its proper divisors (103445014621900).

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

61212665362100 is a wasteful number, since it uses less digits than its factorization.

61212665362100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125461578 (or 125461571 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 61212665362100 in words is "sixty-one trillion, two hundred twelve billion, six hundred sixty-five million, three hundred sixty-two thousand, one hundred".