1973064517957 has 8 divisors (see below), whose sum is σ = 2145876720120. Its totient is φ = 1803257745600.

The previous prime is 1973064517939. The next prime is 1973064517981. The reversal of 1973064517957 is 7597154603791.

It can be written as a sum of positive squares in 4 ways, for example, as 34882659361 + 1938181858596 = 186769^2 + 1392186^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1973064517957 - 2⁷ = 1973064517829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1973064517927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 751356082 + ... + 751358707.

It is an arithmetic number, because the mean of its divisors is an integer number (268234590015).

Almost surely, 2^{1973064517957} is an apocalyptic number.

It is an amenable number.

1973064517957 is a deficient number, since it is larger than the sum of its proper divisors (172812202163).

1973064517957 is a wasteful number, since it uses less digits than its factorization.

1973064517957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502714903.

The product of its (nonzero) digits is 50009400, while the sum is 64.

The spelling of 1973064517957 in words is "one trillion, nine hundred seventy-three billion, sixty-four million, five hundred seventeen thousand, nine hundred fifty-seven".