155402243040 has 96 divisors (see below), whose sum is σ = 534018635136. Its totient is φ = 37673269760.

The previous prime is 155402242991. The next prime is 155402243047. The reversal of 155402243040 is 40342204551.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 155402242989 and 155402243007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155402243047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14710842 + ... + 14721401.

It is an arithmetic number, because the mean of its divisors is an integer number (5562694116).

Almost surely, 2^155402243040 is an apocalyptic number.

155402243040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155402243040 is an abundant number, since it is smaller than the sum of its proper divisors (378616392096).

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

155402243040 is a wasteful number, since it uses less digits than its factorization.

155402243040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29432272 (or 29432264 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 155402243040 its reverse (40342204551), we get a palindrome (195744447591).

The spelling of 155402243040 in words is "one hundred fifty-five billion, four hundred two million, two hundred forty-three thousand, forty".