37742424781 has 2 divisors, whose sum is σ = 37742424782. Its totient is φ = 37742424780.

The previous prime is 37742424773. The next prime is 37742424857. The reversal of 37742424781 is 18742424773.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31573736100 + 6168688681 = 177690^2 + 78541^2 .

It is a cyclic number.

It is not a de Polignac number, because 37742424781 - 2³ = 37742424773 is a prime.

It is a super-2 number, since 2×37742424781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37742427781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18871212390 + 18871212391.

It is an arithmetic number, because the mean of its divisors is an integer number (18871212391).

Almost surely, 2^37742424781 is an apocalyptic number.

It is an amenable number.

37742424781 is a deficient number, since it is larger than the sum of its proper divisors (1).

37742424781 is an equidigital number, since it uses as much as digits as its factorization.

37742424781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2107392, while the sum is 49.

The spelling of 37742424781 in words is "thirty-seven billion, seven hundred forty-two million, four hundred twenty-four thousand, seven hundred eighty-one".