381787342658 has 4 divisors (see below), whose sum is σ = 572681013990. Its totient is φ = 190893671328.

The previous prime is 381787342633. The next prime is 381787342819. The reversal of 381787342658 is 856243787183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 856243787183 = 17 ⋅50367281599.

It can be written as a sum of positive squares in only one way, i.e., 229083805129 + 152703537529 = 478627^2 + 390773^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 381787342658.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95446835663 + ... + 95446835666.

Almost surely, 2^381787342658 is an apocalyptic number.

381787342658 is a deficient number, since it is larger than the sum of its proper divisors (190893671332).

381787342658 is a wasteful number, since it uses less digits than its factorization.

381787342658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190893671331.

The product of its digits is 54190080, while the sum is 62.

The spelling of 381787342658 in words is "three hundred eighty-one billion, seven hundred eighty-seven million, three hundred forty-two thousand, six hundred fifty-eight".