61472755969 has 9 divisors (see below), whose sum is σ = 63188514921. Its totient is φ = 59802404400.

The previous prime is 61472755963. The next prime is 61472755997. The reversal of 61472755969 is 96955727416.

The square root of 61472755969 is 247937.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 7503890625 + 53968865344 = 86625^2 + 232312^2 .

It is not a de Polignac number, because 61472755969 - 2³ = 61472755961 is a prime.

It is a super-2 number, since 2×61472755969² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61472755961) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9170319 + ... + 9177019.

Almost surely, 2^61472755969 is an apocalyptic number.

61472755969 is the 247937-th square number.

61472755969 is the 123969-th centered octagonal number.

It is an amenable number.

61472755969 is a deficient number, since it is larger than the sum of its proper divisors (1715758952).

61472755969 is an frugal number, since it uses more digits than its factorization.

61472755969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13476 (or 6738 counting only the distinct ones).

The product of its digits is 28576800, while the sum is 61.

The spelling of 61472755969 in words is "sixty-one billion, four hundred seventy-two million, seven hundred fifty-five thousand, nine hundred sixty-nine".