155402440535451 has 8 divisors (see below), whose sum is σ = 207236211485184. Its totient is φ = 103585148304680.

The previous prime is 155402440535443. The next prime is 155402440535477. The reversal of 155402440535451 is 154535044204551.

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 155402440535451 - 2³ = 155402440535443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155402440535451.

It is not an unprimeable number, because it can be changed into a prime (155402440135451) 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, 4119657735 + ... + 4119695456.

It is an arithmetic number, because the mean of its divisors is an integer number (25904526435648).

Almost surely, 2^{155402440535451} is an apocalyptic number.

155402440535451 is a deficient number, since it is larger than the sum of its proper divisors (51833770949733).

155402440535451 is an equidigital number, since it uses as much as digits as its factorization.

155402440535451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8239359481.

The product of its (nonzero) digits is 4800000, while the sum is 48.

The spelling of 155402440535451 in words is "one hundred fifty-five trillion, four hundred two billion, four hundred forty million, five hundred thirty-five thousand, four hundred fifty-one".