1913661357 has 16 divisors (see below), whose sum is σ = 2582147520. Its totient is φ = 1260496512.

The previous prime is 1913661307. The next prime is 1913661371. The reversal of 1913661357 is 7531663191.

It is not a de Polignac number, because 1913661357 - 2¹⁶ = 1913595821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913661307) 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, 681318 + ... + 684120.

It is an arithmetic number, because the mean of its divisors is an integer number (161384220).

Almost surely, 2^1913661357 is an apocalyptic number.

It is an amenable number.

1913661357 is a deficient number, since it is larger than the sum of its proper divisors (668486163).

1913661357 is a wasteful number, since it uses less digits than its factorization.

1913661357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5452.

The product of its digits is 102060, while the sum is 42.

The square root of 1913661357 is about 43745.4152683456. The cubic root of 1913661357 is about 1241.5237418501.

The spelling of 1913661357 in words is "one billion, nine hundred thirteen million, six hundred sixty-one thousand, three hundred fifty-seven".