140155891877 has 8 divisors (see below), whose sum is σ = 140326357080. Its totient is φ = 139985533440.

The previous prime is 140155891807. The next prime is 140155891919. The reversal of 140155891877 is 778198551041.

It is a happy number.

It is a Cunningham number, because it is equal to 374374²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 160934596 + 139994957281 = 12686^2 + 374159^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 140155891877 - 2²² = 140151697573 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 (140155891807) 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, 2776253 + ... + 2826285.

It is an arithmetic number, because the mean of its divisors is an integer number (17540794635).

Almost surely, 2^140155891877 is an apocalyptic number.

It is an amenable number.

140155891877 is a deficient number, since it is larger than the sum of its proper divisors (170465203).

140155891877 is a wasteful number, since it uses less digits than its factorization.

140155891877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53383.

The product of its (nonzero) digits is 2822400, while the sum is 56.

The spelling of 140155891877 in words is "one hundred forty billion, one hundred fifty-five million, eight hundred ninety-one thousand, eight hundred seventy-seven".