10650397978 has 48 divisors (see below), whose sum is σ = 18984036960. Its totient is φ = 4462270560.

The previous prime is 10650397973. The next prime is 10650397993. The reversal of 10650397978 is 87979305601.

It is a super-2 number, since 2×10650397978² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10650397973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138825 + ... + 201427.

It is an arithmetic number, because the mean of its divisors is an integer number (395500770).

Almost surely, 2^10650397978 is an apocalyptic number.

10650397978 is a deficient number, since it is larger than the sum of its proper divisors (8333638982).

10650397978 is a wasteful number, since it uses less digits than its factorization.

10650397978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62683 (or 62672 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 55.

The spelling of 10650397978 in words is "ten billion, six hundred fifty million, three hundred ninety-seven thousand, nine hundred seventy-eight".