61244636104 has 8 divisors (see below), whose sum is σ = 114833692710. Its totient is φ = 30622318048.

The previous prime is 61244636069. The next prime is 61244636171. The reversal of 61244636104 is 40163644216.

It can be written as a sum of positive squares in only one way, i.e., 54844956100 + 6399680004 = 234190^2 + 79998^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×61244636104² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3827789749 + ... + 3827789764.

Almost surely, 2^61244636104 is an apocalyptic number.

It is an amenable number.

61244636104 is a deficient number, since it is larger than the sum of its proper divisors (53589056606).

61244636104 is a wasteful number, since it uses less digits than its factorization.

61244636104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7655579519 (or 7655579515 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 61244636104 in words is "sixty-one billion, two hundred forty-four million, six hundred thirty-six thousand, one hundred four".