61667289040 has 80 divisors (see below), whose sum is σ = 170983127808. Its totient is φ = 20223802368.

The previous prime is 61667289023. The next prime is 61667289041. The reversal of 61667289040 is 4098276616.

61667289040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61667289041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2381037 + ... + 2406796.

Almost surely, 2^61667289040 is an apocalyptic number.

It is an amenable number.

61667289040 is an abundant number, since it is smaller than the sum of its proper divisors (109315838768).

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

61667289040 is a wasteful number, since it uses less digits than its factorization.

61667289040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4787876 (or 4787870 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 61667289040 in words is "sixty-one billion, six hundred sixty-seven million, two hundred eighty-nine thousand, forty".