15397153247878 has 64 divisors (see below), whose sum is σ = 25581679884288. Its totient is φ = 6919515187200.

The previous prime is 15397153247873. The next prime is 15397153247881. The reversal of 15397153247878 is 87874235179351.

It is a happy number.

It is a super-2 number, since 2×15397153247878² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15397153247873) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67018903 + ... + 67248253.

It is an arithmetic number, because the mean of its divisors is an integer number (399713748192).

Almost surely, 2^{15397153247878} is an apocalyptic number.

15397153247878 is a deficient number, since it is larger than the sum of its proper divisors (10184526636410).

15397153247878 is a wasteful number, since it uses less digits than its factorization.

15397153247878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230437.

The product of its digits is 355622400, while the sum is 70.

The spelling of 15397153247878 in words is "fifteen trillion, three hundred ninety-seven billion, one hundred fifty-three million, two hundred forty-seven thousand, eight hundred seventy-eight".