345988407281 has 8 divisors (see below), whose sum is σ = 386647799328. Its totient is φ = 306863332000.

The previous prime is 345988407251. The next prime is 345988407307. The reversal of 345988407281 is 182704889543.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 345988407281 - 2³⁸ = 71110500337 is a prime.

It is a super-2 number, since 2×345988407281² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 345988407281.

It is not an unprimeable number, because it can be changed into a prime (345988407251) 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, 383578715 + ... + 383579616.

It is an arithmetic number, because the mean of its divisors is an integer number (48330974916).

Almost surely, 2^345988407281 is an apocalyptic number.

It is an amenable number.

345988407281 is a deficient number, since it is larger than the sum of its proper divisors (40659392047).

345988407281 is a wasteful number, since it uses less digits than its factorization.

345988407281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767158383.

The product of its (nonzero) digits is 15482880, while the sum is 59.

The spelling of 345988407281 in words is "three hundred forty-five billion, nine hundred eighty-eight million, four hundred seven thousand, two hundred eighty-one".