61640412006 has 16 divisors (see below), whose sum is σ = 124477726464. Its totient is φ = 20347320264.

The previous prime is 61640411957. The next prime is 61640412017. The reversal of 61640412006 is 60021404616.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49870266 + ... + 49871501.

It is an arithmetic number, because the mean of its divisors is an integer number (7779857904).

Almost surely, 2^61640412006 is an apocalyptic number.

61640412006 is an abundant number, since it is smaller than the sum of its proper divisors (62837314458).

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

61640412006 is a wasteful number, since it uses less digits than its factorization.

61640412006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99741875.

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 61640412006 in words is "sixty-one billion, six hundred forty million, four hundred twelve thousand, six".