155340145040 has 40 divisors (see below), whose sum is σ = 362604791808. Its totient is φ = 61888496000.

The previous prime is 155340145031. The next prime is 155340145097. The reversal of 155340145040 is 40541043551.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×155340145040² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155340144988 and 155340145006.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3847952 + ... + 3888111.

Almost surely, 2^155340145040 is an apocalyptic number.

155340145040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155340145040 is an abundant number, since it is smaller than the sum of its proper divisors (207264646768).

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

155340145040 is a wasteful number, since it uses less digits than its factorization.

155340145040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7736327 (or 7736321 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 155340145040 its reverse (40541043551), we get a palindrome (195881188591).

The spelling of 155340145040 in words is "one hundred fifty-five billion, three hundred forty million, one hundred forty-five thousand, forty".