1925778550497 has 16 divisors (see below), whose sum is σ = 2651989707648. Its totient is φ = 1242373541760.

The previous prime is 1925778550471. The next prime is 1925778550499. The reversal of 1925778550497 is 7940558775291.

It is a happy number.

It is not a de Polignac number, because 1925778550497 - 2⁶ = 1925778550433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1925778550499) 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, 82946029 + ... + 82969242.

It is an arithmetic number, because the mean of its divisors is an integer number (165749356728).

Almost surely, 2^{1925778550497} is an apocalyptic number.

It is an amenable number.

1925778550497 is a deficient number, since it is larger than the sum of its proper divisors (726211157151).

1925778550497 is a wasteful number, since it uses less digits than its factorization.

1925778550497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165915400.

The product of its (nonzero) digits is 222264000, while the sum is 69.

The spelling of 1925778550497 in words is "one trillion, nine hundred twenty-five billion, seven hundred seventy-eight million, five hundred fifty thousand, four hundred ninety-seven".