354398517840 has 80 divisors (see below), whose sum is σ = 1128328282368. Its totient is φ = 91952045568.

The previous prime is 354398517769. The next prime is 354398517923. The reversal of 354398517840 is 48715893453.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19945992 + ... + 19963751.

Almost surely, 2^354398517840 is an apocalyptic number.

354398517840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

354398517840 is an abundant number, since it is smaller than the sum of its proper divisors (773929764528).

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

354398517840 is a wasteful number, since it uses less digits than its factorization.

354398517840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39909796 (or 39909790 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 57.

The spelling of 354398517840 in words is "three hundred fifty-four billion, three hundred ninety-eight million, five hundred seventeen thousand, eight hundred forty".