79722099450 has 480 divisors, whose sum is σ = 262159970688. Its totient is φ = 17584128000.

The previous prime is 79722099439. The next prime is 79722099467. The reversal of 79722099450 is 5499022797.

It is a super-2 number, since 2×79722099450² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 124371130 + ... + 124371770.

Almost surely, 2^79722099450 is an apocalyptic number.

79722099450 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 79722099450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131079985344).

79722099450 is an abundant number, since it is smaller than the sum of its proper divisors (182437871238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79722099450 is a wasteful number, since it uses less digits than its factorization.

79722099450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820 (or 806 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The spelling of 79722099450 in words is "seventy-nine billion, seven hundred twenty-two million, ninety-nine thousand, four hundred fifty".