140457777781 has 16 divisors (see below), whose sum is σ = 144944562240. Its totient is φ = 136042980480.

The previous prime is 140457777749. The next prime is 140457777827. The reversal of 140457777781 is 187777754041.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 140457777781 - 2⁵ = 140457777749 is a prime.

It is a super-2 number, since 2×140457777781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140457777181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16053450 + ... + 16062196.

It is an arithmetic number, because the mean of its divisors is an integer number (9059035140).

Almost surely, 2^140457777781 is an apocalyptic number.

It is an amenable number.

140457777781 is a deficient number, since it is larger than the sum of its proper divisors (4486784459).

140457777781 is an equidigital number, since it uses as much as digits as its factorization.

140457777781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12804.

The product of its (nonzero) digits is 10756480, while the sum is 58.

The spelling of 140457777781 in words is "one hundred forty billion, four hundred fifty-seven million, seven hundred seventy-seven thousand, seven hundred eighty-one".