612105001557 has 16 divisors (see below), whose sum is σ = 938908465152. Its totient is φ = 347457898800.

The previous prime is 612105001553. The next prime is 612105001589. The reversal of 612105001557 is 755100501216.

It is a happy number.

It is not a de Polignac number, because 612105001557 - 2² = 612105001553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612105001553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96512913 + ... + 96519254.

It is an arithmetic number, because the mean of its divisors is an integer number (58681779072).

Almost surely, 2^612105001557 is an apocalyptic number.

It is an amenable number.

612105001557 is a deficient number, since it is larger than the sum of its proper divisors (326803463595).

612105001557 is a wasteful number, since it uses less digits than its factorization.

612105001557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193032328.

The product of its (nonzero) digits is 10500, while the sum is 33.

The spelling of 612105001557 in words is "six hundred twelve billion, one hundred five million, one thousand, five hundred fifty-seven".