642554340 has 24 divisors (see below), whose sum is σ = 1799152320. Its totient is φ = 171347808.

The previous prime is 642554333. The next prime is 642554347. The reversal of 642554340 is 43455246.

It is an interprime number because it is at equal distance from previous prime (642554333) and next prime (642554347).

It is not an unprimeable number, because it can be changed into a prime (642554347) 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, 5354560 + ... + 5354679.

It is an arithmetic number, because the mean of its divisors is an integer number (74964680).

Almost surely, 2^642554340 is an apocalyptic number.

642554340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

642554340 is an abundant number, since it is smaller than the sum of its proper divisors (1156597980).

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

642554340 is a wasteful number, since it uses less digits than its factorization.

642554340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10709251 (or 10709249 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 33.

The square root of 642554340 is about 25348.6555856519. The cubic root of 642554340 is about 862.9188455075.

The spelling of 642554340 in words is "six hundred forty-two million, five hundred fifty-four thousand, three hundred forty".