1578261323137 has 16 divisors (see below), whose sum is σ = 1681391630592. Its totient is φ = 1476289474560.

The previous prime is 1578261323131. The next prime is 1578261323153. The reversal of 1578261323137 is 7313231628751.

It is a cyclic number.

It is not a de Polignac number, because 1578261323137 - 2³ = 1578261323129 is a prime.

It is a super-2 number, since 2×1578261323137² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1578261323131) 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, 3149428 + ... + 3615994.

It is an arithmetic number, because the mean of its divisors is an integer number (105086976912).

Almost surely, 2^{1578261323137} is an apocalyptic number.

1578261323137 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1578261323137 is a deficient number, since it is larger than the sum of its proper divisors (103130307455).

1578261323137 is a wasteful number, since it uses less digits than its factorization.

1578261323137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467808.

The product of its digits is 1270080, while the sum is 49.

The spelling of 1578261323137 in words is "one trillion, five hundred seventy-eight billion, two hundred sixty-one million, three hundred twenty-three thousand, one hundred thirty-seven".