1972747405501 has 2 divisors, whose sum is σ = 1972747405502. Its totient is φ = 1972747405500.

The previous prime is 1972747405471. The next prime is 1972747405579. The reversal of 1972747405501 is 1055047472791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1933626521401 + 39120884100 = 1390549^2 + 197790^2 .

It is a cyclic number.

It is not a de Polignac number, because 1972747405501 - 2⁵ = 1972747405469 is a prime.

It is a super-2 number, since 2×1972747405501² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1972747415501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986373702750 + 986373702751.

It is an arithmetic number, because the mean of its divisors is an integer number (986373702751).

Almost surely, 2^{1972747405501} is an apocalyptic number.

It is an amenable number.

1972747405501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972747405501 is an equidigital number, since it uses as much as digits as its factorization.

1972747405501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2469600, while the sum is 52.

The spelling of 1972747405501 in words is "one trillion, nine hundred seventy-two billion, seven hundred forty-seven million, four hundred five thousand, five hundred one".