153542640 has 80 divisors (see below), whose sum is σ = 503994528. Its totient is φ = 38535168.

The previous prime is 153542633. The next prime is 153542647. The reversal of 153542640 is 46245351.

It is an interprime number because it is at equal distance from previous prime (153542633) and next prime (153542647).

It is a tau number, because it is divible by the number of its divisors (80).

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 = 153542598 and 153542607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153542647) 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, 14737 + ... + 22896.

Almost surely, 2^153542640 is an apocalyptic number.

153542640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

153542640 is an abundant number, since it is smaller than the sum of its proper divisors (350451888).

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

153542640 is a wasteful number, since it uses less digits than its factorization.

153542640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37666 (or 37660 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 153542640 is about 12391.2323842304. The cubic root of 153542640 is about 535.4796874011.

Adding to 153542640 its reverse (46245351), we get a palindrome (199787991).

The spelling of 153542640 in words is "one hundred fifty-three million, five hundred forty-two thousand, six hundred forty".