61372142669 has 2 divisors, whose sum is σ = 61372142670. Its totient is φ = 61372142668.

The previous prime is 61372142651. The next prime is 61372142701. The reversal of 61372142669 is 96624127316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40531755625 + 20840387044 = 201325^2 + 144362^2 .

It is a cyclic number.

It is not a de Polignac number, because 61372142669 - 2⁸ = 61372142413 is a prime.

It is a super-2 number, since 2×61372142669² (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 (61372145669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30686071334 + 30686071335.

It is an arithmetic number, because the mean of its divisors is an integer number (30686071335).

Almost surely, 2^61372142669 is an apocalyptic number.

It is an amenable number.

61372142669 is a deficient number, since it is larger than the sum of its proper divisors (1).

61372142669 is an equidigital number, since it uses as much as digits as its factorization.

61372142669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 47.

The spelling of 61372142669 in words is "sixty-one billion, three hundred seventy-two million, one hundred forty-two thousand, six hundred sixty-nine".