61000000037 has 2 divisors, whose sum is σ = 61000000038. Its totient is φ = 61000000036.

The previous prime is 61000000007. The next prime is 61000000063. The reversal of 61000000037 is 73000000016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58083892036 + 2916108001 = 241006^2 + 54001^2 .

It is a cyclic number.

It is not a de Polignac number, because 61000000037 - 2³⁴ = 43820130853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 60999999961 and 61000000024.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61000000007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30500000018 + 30500000019.

It is an arithmetic number, because the mean of its divisors is an integer number (30500000019).

Almost surely, 2^61000000037 is an apocalyptic number.

It is an amenable number.

61000000037 is a deficient number, since it is larger than the sum of its proper divisors (1).

61000000037 is an equidigital number, since it uses as much as digits as its factorization.

61000000037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 17.

The spelling of 61000000037 in words is "sixty-one billion, thirty-seven", and thus it is an aban number and an uban number.