1261632315047 has 16 divisors (see below), whose sum is σ = 1438641842400. Its totient is φ = 1096049436672.

The previous prime is 1261632315043. The next prime is 1261632315077. The reversal of 1261632315047 is 7405132361621.

It is a cyclic number.

It is not a de Polignac number, because 1261632315047 - 2² = 1261632315043 is a prime.

It is a super-2 number, since 2×1261632315047² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1261632314995 and 1261632315013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261632315043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14408204 + ... + 14495502.

It is an arithmetic number, because the mean of its divisors is an integer number (89915115150).

Almost surely, 2^{1261632315047} is an apocalyptic number.

1261632315047 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1261632315047 is a deficient number, since it is larger than the sum of its proper divisors (177009527353).

1261632315047 is a wasteful number, since it uses less digits than its factorization.

1261632315047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152722.

The product of its (nonzero) digits is 181440, while the sum is 41.

Adding to 1261632315047 its reverse (7405132361621), we get a palindrome (8666764676668).

The spelling of 1261632315047 in words is "one trillion, two hundred sixty-one billion, six hundred thirty-two million, three hundred fifteen thousand, forty-seven".