642051741234 has 16 divisors (see below), whose sum is σ = 1287082846080. Its totient is φ = 213520686480.

The previous prime is 642051741229. The next prime is 642051741259. The reversal of 642051741234 is 432147150246.

It is a super-2 number, since 2×642051741234² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 642051741192 and 642051741201.

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, 124137349 + ... + 124142520.

It is an arithmetic number, because the mean of its divisors is an integer number (80442677880).

Almost surely, 2^642051741234 is an apocalyptic number.

642051741234 is an abundant number, since it is smaller than the sum of its proper divisors (645031104846).

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

642051741234 is a wasteful number, since it uses less digits than its factorization.

642051741234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248280305.

The product of its (nonzero) digits is 161280, while the sum is 39.

The spelling of 642051741234 in words is "six hundred forty-two billion, fifty-one million, seven hundred forty-one thousand, two hundred thirty-four".