242012151640 has 128 divisors (see below), whose sum is σ = 659114755200. Its totient is φ = 78072053760.

The previous prime is 242012151599. The next prime is 242012151643. The reversal of 242012151640 is 46151210242.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 242012151599 and 242012151608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242012151643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26275356 + ... + 26284564.

It is an arithmetic number, because the mean of its divisors is an integer number (5149334025).

Almost surely, 2^242012151640 is an apocalyptic number.

242012151640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 242012151640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329557377600).

242012151640 is an abundant number, since it is smaller than the sum of its proper divisors (417102603560).

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

242012151640 is a wasteful number, since it uses less digits than its factorization.

242012151640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14765 (or 14761 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 242012151640 its reverse (46151210242), we get a palindrome (288163361882).

The spelling of 242012151640 in words is "two hundred forty-two billion, twelve million, one hundred fifty-one thousand, six hundred forty".