153999399940 has 24 divisors (see below), whose sum is σ = 323414222040. Its totient is φ = 61596811008.

The previous prime is 153999399929. The next prime is 153999399941. The reversal of 153999399940 is 49993999351.

It can be written as a sum of positive squares in 4 ways, for example, as 32626944 + 153966772996 = 5712^2 + 392386^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 153999399940.

It is not an unprimeable number, because it can be changed into a prime (153999399941) 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, 271384 + ... + 617776.

It is an arithmetic number, because the mean of its divisors is an integer number (13475592585).

Almost surely, 2^153999399940 is an apocalyptic number.

153999399940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

153999399940 is an abundant number, since it is smaller than the sum of its proper divisors (169414822100).

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

153999399940 is a wasteful number, since it uses less digits than its factorization.

153999399940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368631 (or 368629 counting only the distinct ones).

The product of its (nonzero) digits is 95659380, while the sum is 70.

The spelling of 153999399940 in words is "one hundred fifty-three billion, nine hundred ninety-nine million, three hundred ninety-nine thousand, nine hundred forty".