1311661142025 has 96 divisors (see below), whose sum is σ = 2346318576000. Its totient is φ = 642734837760.

The previous prime is 1311661142023. The next prime is 1311661142041. The reversal of 1311661142025 is 5202411661131.

It is not a de Polignac number, because 1311661142025 - 2¹ = 1311661142023 is a prime.

It is a super-2 number, since 2×1311661142025² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1311661142023) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 424621681 + ... + 424624769.

It is an arithmetic number, because the mean of its divisors is an integer number (24440818500).

Almost surely, 2^{1311661142025} is an apocalyptic number.

1311661142025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311661142025 is a deficient number, since it is larger than the sum of its proper divisors (1034657433975).

1311661142025 is a wasteful number, since it uses less digits than its factorization.

1311661142025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5003 (or 4998 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The spelling of 1311661142025 in words is "one trillion, three hundred eleven billion, six hundred sixty-one million, one hundred forty-two thousand, twenty-five".