1661550015151 has 8 divisors (see below), whose sum is σ = 1790615507184. Its totient is φ = 1532663659200.

The previous prime is 1661550015127. The next prime is 1661550015199. The reversal of 1661550015151 is 1515100551661.

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

It is a cyclic number.

It is not a de Polignac number, because 1661550015151 - 2¹³ = 1661550006959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1661550015151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661550010151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44764750 + ... + 44801851.

It is an arithmetic number, because the mean of its divisors is an integer number (223826938398).

Almost surely, 2^{1661550015151} is an apocalyptic number.

1661550015151 is a deficient number, since it is larger than the sum of its proper divisors (129065492033).

1661550015151 is a wasteful number, since it uses less digits than its factorization.

1661550015151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89568041.

The product of its (nonzero) digits is 22500, while the sum is 37.

The spelling of 1661550015151 in words is "one trillion, six hundred sixty-one billion, five hundred fifty million, fifteen thousand, one hundred fifty-one".