345278481525 has 36 divisors (see below), whose sum is σ = 619236638020. Its totient is φ = 183908966400.

The previous prime is 345278481511. The next prime is 345278481553. The reversal of 345278481525 is 525184872543.

It is a happy number.

345278481525 is a `hidden beast` number, since 3 + 4 + 5 + 2 + 78 + 48 + 1 + 525 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 39769134084 + 305509347441 = 199422^2 + 552729^2 .

It is not a de Polignac number, because 345278481525 - 2⁷ = 345278481397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 824746 + ... + 1170795.

Almost surely, 2^345278481525 is an apocalyptic number.

It is an amenable number.

345278481525 is a deficient number, since it is larger than the sum of its proper divisors (273958156495).

345278481525 is a wasteful number, since it uses less digits than its factorization.

345278481525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996326 (or 1996318 counting only the distinct ones).

The product of its digits is 10752000, while the sum is 54.

The spelling of 345278481525 in words is "three hundred forty-five billion, two hundred seventy-eight million, four hundred eighty-one thousand, five hundred twenty-five".