37777364081 has 2 divisors, whose sum is σ = 37777364082. Its totient is φ = 37777364080.

The previous prime is 37777364033. The next prime is 37777364101. The reversal of 37777364081 is 18046377773.

It is a happy number.

37777364081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37564641856 + 212722225 = 193816^2 + 14585^2 .

It is an emirp because it is prime and its reverse (18046377773) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37777364081 is a prime.

It is a super-2 number, since 2×37777364081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (37777334081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18888682040 + 18888682041.

It is an arithmetic number, because the mean of its divisors is an integer number (18888682041).

Almost surely, 2^37777364081 is an apocalyptic number.

It is an amenable number.

37777364081 is a deficient number, since it is larger than the sum of its proper divisors (1).

37777364081 is an equidigital number, since it uses as much as digits as its factorization.

37777364081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4148928, while the sum is 53.

The spelling of 37777364081 in words is "thirty-seven billion, seven hundred seventy-seven million, three hundred sixty-four thousand, eighty-one".