140405421064 has 16 divisors (see below), whose sum is σ = 268227338220. Its totient is φ = 68878130880.

The previous prime is 140405421053. The next prime is 140405421097. The reversal of 140405421064 is 460124504041.

It can be written as a sum of positive squares in 2 ways, for example, as 138987296100 + 1418124964 = 372810^2 + 37658^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165572007 + ... + 165572854.

Almost surely, 2^140405421064 is an apocalyptic number.

It is an amenable number.

140405421064 is a deficient number, since it is larger than the sum of its proper divisors (127821917156).

140405421064 is a wasteful number, since it uses less digits than its factorization.

140405421064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331144920 (or 331144916 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The spelling of 140405421064 in words is "one hundred forty billion, four hundred five million, four hundred twenty-one thousand, sixty-four".