945121003978 has 8 divisors (see below), whose sum is σ = 1417916667780. Its totient is φ = 472482114720.

The previous prime is 945121003973. The next prime is 945121003979. The reversal of 945121003978 is 879300121549.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 944175625969 + 945378009 = 971687^2 + 30747^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (945121003973) 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, 39178563 + ... + 39202678.

Almost surely, 2^945121003978 is an apocalyptic number.

945121003978 is a deficient number, since it is larger than the sum of its proper divisors (472795663802).

945121003978 is a wasteful number, since it uses less digits than its factorization.

945121003978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78387272.

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 945121003978 in words is "nine hundred forty-five billion, one hundred twenty-one million, three thousand, nine hundred seventy-eight".