1615256601 has 16 divisors (see below), whose sum is σ = 2518585344. Its totient is φ = 901538064.

The previous prime is 1615256579. The next prime is 1615256651. The reversal of 1615256601 is 1066525161.

It is not a de Polignac number, because 1615256601 - 2⁶ = 1615256537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1615256651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 893481 + ... + 895286.

It is an arithmetic number, because the mean of its divisors is an integer number (157411584).

Almost surely, 2^1615256601 is an apocalyptic number.

It is an amenable number.

1615256601 is a deficient number, since it is larger than the sum of its proper divisors (903328743).

1615256601 is a wasteful number, since it uses less digits than its factorization.

1615256601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788820.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 1615256601 is about 40190.2550501984. The cubic root of 1615256601 is about 1173.3128890761.

The spelling of 1615256601 in words is "one billion, six hundred fifteen million, two hundred fifty-six thousand, six hundred one".