615672020069 has 4 divisors (see below), whose sum is σ = 615951492096. Its totient is φ = 615392548044.

The previous prime is 615672020063. The next prime is 615672020071. The reversal of 615672020069 is 960020276516.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-615672020069 is a prime.

It is a super-2 number, since 2×615672020069² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (615672020063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139732709 + ... + 139737114.

It is an arithmetic number, because the mean of its divisors is an integer number (153987873024).

Almost surely, 2^615672020069 is an apocalyptic number.

It is an amenable number.

615672020069 is a deficient number, since it is larger than the sum of its proper divisors (279472027).

615672020069 is a wasteful number, since it uses less digits than its factorization.

615672020069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279472026.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 615672020069 in words is "six hundred fifteen billion, six hundred seventy-two million, twenty thousand, sixty-nine".