1945560157649 has 4 divisors (see below), whose sum is σ = 1945575884400. Its totient is φ = 1945544430900.

The previous prime is 1945560157603. The next prime is 1945560157733. The reversal of 1945560157649 is 9467510655491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1945560157649 - 2²⁰ = 1945559109073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1945560157591 and 1945560157600.

It is not an unprimeable number, because it can be changed into a prime (1945560157549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7676327 + ... + 7925724.

It is an arithmetic number, because the mean of its divisors is an integer number (486393971100).

Almost surely, 2^{1945560157649} is an apocalyptic number.

It is an amenable number.

1945560157649 is a deficient number, since it is larger than the sum of its proper divisors (15726751).

1945560157649 is a wasteful number, since it uses less digits than its factorization.

1945560157649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15726750.

The product of its (nonzero) digits is 40824000, while the sum is 62.

The spelling of 1945560157649 in words is "one trillion, nine hundred forty-five billion, five hundred sixty million, one hundred fifty-seven thousand, six hundred forty-nine".