140952078661 has 4 divisors (see below), whose sum is σ = 142405192972. Its totient is φ = 139498964352.

The previous prime is 140952078653. The next prime is 140952078667. The reversal of 140952078661 is 166870259041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50422702500 + 90529376161 = 224550^2 + 300881^2 .

It is a cyclic number.

It is not a de Polignac number, because 140952078661 - 2³ = 140952078653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140952078667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 726557010 + ... + 726557203.

It is an arithmetic number, because the mean of its divisors is an integer number (35601298243).

Almost surely, 2^140952078661 is an apocalyptic number.

It is an amenable number.

140952078661 is a deficient number, since it is larger than the sum of its proper divisors (1453114311).

140952078661 is an equidigital number, since it uses as much as digits as its factorization.

140952078661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453114310.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 140952078661 in words is "one hundred forty billion, nine hundred fifty-two million, seventy-eight thousand, six hundred sixty-one".