140628691057 has 12 divisors (see below), whose sum is σ = 142579915444. Its totient is φ = 138703557600.

The previous prime is 140628691043. The next prime is 140628691103. The reversal of 140628691057 is 750196826041.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 33251887201 + 107376803856 = 182351^2 + 327684^2 .

It is a de Polignac number, because none of the positive numbers 2^k-140628691057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140628691057.

It is not an unprimeable number, because it can be changed into a prime (140628691457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4206307 + ... + 4239607.

Almost surely, 2^140628691057 is an apocalyptic number.

It is an amenable number.

140628691057 is a deficient number, since it is larger than the sum of its proper divisors (1951224387).

140628691057 is an frugal number, since it uses more digits than its factorization.

140628691057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34080 (or 33997 counting only the distinct ones).

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

The spelling of 140628691057 in words is "one hundred forty billion, six hundred twenty-eight million, six hundred ninety-one thousand, fifty-seven".