46640406640 has 40 divisors (see below), whose sum is σ = 109924424208. Its totient is φ = 18400596480.

The previous prime is 46640406539. The next prime is 46640406643. The reversal of 46640406640 is 4660404664.

It is a happy number.

46640406640 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 (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 46640406593 and 46640406602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (46640406643) 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, 3987346 + ... + 3999025.

Almost surely, 2^46640406640 is an apocalyptic number.

46640406640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

46640406640 is an abundant number, since it is smaller than the sum of its proper divisors (63284017568).

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

46640406640 is a wasteful number, since it uses less digits than its factorization.

46640406640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7986457 (or 7986451 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 40.

The spelling of 46640406640 in words is "forty-six billion, six hundred forty million, four hundred six thousand, six hundred forty".