1261632315048 has 256 divisors, whose sum is σ = 3861762355200. Its totient is φ = 335445442560.

The previous prime is 1261632315043. The next prime is 1261632315077. The reversal of 1261632315048 is 8405132361621.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 63 ways as a sum of consecutive naturals, for example, 160244040 + ... + 160251912.

It is an arithmetic number, because the mean of its divisors is an integer number (15085009200).

Almost surely, 2^{1261632315048} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1261632315048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1930881177600).

1261632315048 is an abundant number, since it is smaller than the sum of its proper divisors (2600130040152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1261632315048 is a wasteful number, since it uses less digits than its factorization.

1261632315048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8792 (or 8788 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

Adding to 1261632315048 its reverse (8405132361621), we get a palindrome (9666764676669).

The spelling of 1261632315048 in words is "one trillion, two hundred sixty-one billion, six hundred thirty-two million, three hundred fifteen thousand, forty-eight".