1957715445 has 32 divisors (see below), whose sum is σ = 3768238080. Its totient is φ = 847851840.

The previous prime is 1957715443. The next prime is 1957715471. The reversal of 1957715445 is 5445177591.

It is not a de Polignac number, because 1957715445 - 2¹ = 1957715443 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1957715394 and 1957715403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1957715443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 488661 + ... + 492650.

It is an arithmetic number, because the mean of its divisors is an integer number (117757440).

Almost surely, 2^1957715445 is an apocalyptic number.

1957715445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1957715445 is a deficient number, since it is larger than the sum of its proper divisors (1810522635).

1957715445 is a wasteful number, since it uses less digits than its factorization.

1957715445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981345.

The product of its digits is 882000, while the sum is 48.

The square root of 1957715445 is about 44246.0783007941. The cubic root of 1957715445 is about 1250.9785287187.

The spelling of 1957715445 in words is "one billion, nine hundred fifty-seven million, seven hundred fifteen thousand, four hundred forty-five".