1561038488138 has 8 divisors (see below), whose sum is σ = 2391378109632. Its totient is φ = 763912451596.

The previous prime is 1561038488117. The next prime is 1561038488203. The reversal of 1561038488138 is 8318848301651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1561038488138² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8303396120 + ... + 8303396307.

It is an arithmetic number, because the mean of its divisors is an integer number (298922263704).

Almost surely, 2^{1561038488138} is an apocalyptic number.

1561038488138 is a deficient number, since it is larger than the sum of its proper divisors (830339621494).

1561038488138 is a wasteful number, since it uses less digits than its factorization.

1561038488138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16606792476.

The product of its (nonzero) digits is 4423680, while the sum is 56.

The spelling of 1561038488138 in words is "one trillion, five hundred sixty-one billion, thirty-eight million, four hundred eighty-eight thousand, one hundred thirty-eight".