1972747415501 has 2 divisors, whose sum is σ = 1972747415502. Its totient is φ = 1972747415500.

The previous prime is 1972747415473. The next prime is 1972747415531. The reversal of 1972747415501 is 1055147472791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1776875670025 + 195871745476 = 1332995^2 + 442574^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1972747415501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1972747415531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986373707750 + 986373707751.

It is an arithmetic number, because the mean of its divisors is an integer number (986373707751).

Almost surely, 2^{1972747415501} is an apocalyptic number.

It is an amenable number.

1972747415501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972747415501 is an equidigital number, since it uses as much as digits as its factorization.

1972747415501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2469600, while the sum is 53.

The spelling of 1972747415501 in words is "one trillion, nine hundred seventy-two billion, seven hundred forty-seven million, four hundred fifteen thousand, five hundred one".