61211539674 has 16 divisors (see below), whose sum is σ = 136025643840. Its totient is φ = 20403846540.

The previous prime is 61211539673. The next prime is 61211539759. The reversal of 61211539674 is 47693511216.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61211539673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 566773462 + ... + 566773569.

It is an arithmetic number, because the mean of its divisors is an integer number (8501602740).

Almost surely, 2^61211539674 is an apocalyptic number.

61211539674 is an abundant number, since it is smaller than the sum of its proper divisors (74814104166).

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

61211539674 is a wasteful number, since it uses less digits than its factorization.

61211539674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133547042 (or 1133547036 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The spelling of 61211539674 in words is "sixty-one billion, two hundred eleven million, five hundred thirty-nine thousand, six hundred seventy-four".