142640671684 has 81 divisors (see below), whose sum is σ = 296540404167. Its totient is φ = 59860452288.

The previous prime is 142640671673. The next prime is 142640671711. The reversal of 142640671684 is 486176046241.

The square root of 142640671684 is 377678.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 41180584900 + 101460086784 = 202930^2 + 318528^2 .

It is a super-2 number, since 2×142640671684² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 280236822 + ... + 280237330.

Almost surely, 2^142640671684 is an apocalyptic number.

142640671684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

142640671684 is the 377678-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142640671684

142640671684 is an abundant number, since it is smaller than the sum of its proper divisors (153899732483).

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

142640671684 is an frugal number, since it uses more digits than its factorization.

142640671684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142 (or 571 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 49.

Multiplying 142640671684 by its sum of digits (49), we get a square (6989392912516 = 2643746²).

142640671684 divided by its sum of digits (49) gives a square (2911034116 = 53954²).

The spelling of 142640671684 in words is "one hundred forty-two billion, six hundred forty million, six hundred seventy-one thousand, six hundred eighty-four".