15345299972 has 6 divisors (see below), whose sum is σ = 26854274958. Its totient is φ = 7672649984.

The previous prime is 15345299971. The next prime is 15345300001. The reversal of 15345299972 is 27999254351.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13413345856 + 1931954116 = 115816^2 + 43954^2 .

It is not an unprimeable number, because it can be changed into a prime (15345299971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1918162493 + ... + 1918162500.

It is an arithmetic number, because the mean of its divisors is an integer number (4475712493).

Almost surely, 2^15345299972 is an apocalyptic number.

It is an amenable number.

15345299972 is a deficient number, since it is larger than the sum of its proper divisors (11508974986).

15345299972 is a wasteful number, since it uses less digits than its factorization.

15345299972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3836324997 (or 3836324995 counting only the distinct ones).

The product of its digits is 6123600, while the sum is 56.

The spelling of 15345299972 in words is "fifteen billion, three hundred forty-five million, two hundred ninety-nine thousand, nine hundred seventy-two".