99240292478 has 4 divisors (see below), whose sum is σ = 148860438720. Its totient is φ = 49620146238.

The previous prime is 99240292477. The next prime is 99240292493. The reversal of 99240292478 is 87429204299.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×99240292478² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99240292477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24810073118 + ... + 24810073121.

It is an arithmetic number, because the mean of its divisors is an integer number (37215109680).

Almost surely, 2^99240292478 is an apocalyptic number.

99240292478 is a deficient number, since it is larger than the sum of its proper divisors (49620146242).

99240292478 is a wasteful number, since it uses less digits than its factorization.

99240292478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49620146241.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 99240292478 in words is "ninety-nine billion, two hundred forty million, two hundred ninety-two thousand, four hundred seventy-eight".