61211539683 has 24 divisors (see below), whose sum is σ = 102954185568. Its totient is φ = 34318058112.

The previous prime is 61211539673. The next prime is 61211539759. The reversal of 61211539683 is 38693511216.

It is a de Polignac number, because none of the positive numbers 2^k-61211539683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61211539603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9162810 + ... + 9169487.

It is an arithmetic number, because the mean of its divisors is an integer number (4289757732).

Almost surely, 2^61211539683 is an apocalyptic number.

61211539683 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

61211539683 is a deficient number, since it is larger than the sum of its proper divisors (41742645885).

61211539683 is a wasteful number, since it uses less digits than its factorization.

61211539683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18332363 (or 18332360 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The spelling of 61211539683 in words is "sixty-one billion, two hundred eleven million, five hundred thirty-nine thousand, six hundred eighty-three".