1953746722949 has 6 divisors (see below), whose sum is σ = 2272725779814. Its totient is φ = 1674640048200.

The previous prime is 1953746722931. The next prime is 1953746722973. The reversal of 1953746722949 is 9492276473591.

It can be written as a sum of positive squares in only one way, i.e., 1947300238849 + 6446484100 = 1395457^2 + 80290^2 .

It is not a de Polignac number, because 1953746722949 - 2⁸ = 1953746722693 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1953746722909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19936191002 + ... + 19936191099.

It is an arithmetic number, because the mean of its divisors is an integer number (378787629969).

Almost surely, 2^{1953746722949} is an apocalyptic number.

It is an amenable number.

1953746722949 is a deficient number, since it is larger than the sum of its proper divisors (318979056865).

1953746722949 is an equidigital number, since it uses as much as digits as its factorization.

1953746722949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39872382115 (or 39872382108 counting only the distinct ones).

The product of its digits is 205752960, while the sum is 68.

The spelling of 1953746722949 in words is "one trillion, nine hundred fifty-three billion, seven hundred forty-six million, seven hundred twenty-two thousand, nine hundred forty-nine".