78530201972 has 24 divisors (see below), whose sum is σ = 140684517792. Its totient is φ = 38341648800.

The previous prime is 78530201957. The next prime is 78530202001. The reversal of 78530201972 is 27910203587.

It is a super-2 number, since 2×78530201972² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 833054 + ... + 922517.

It is an arithmetic number, because the mean of its divisors is an integer number (5861854908).

Almost surely, 2^78530201972 is an apocalyptic number.

It is an amenable number.

78530201972 is a deficient number, since it is larger than the sum of its proper divisors (62154315820).

78530201972 is a wasteful number, since it uses less digits than its factorization.

78530201972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1755839 (or 1755837 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 78530201972 in words is "seventy-eight billion, five hundred thirty million, two hundred one thousand, nine hundred seventy-two".