24999999999990 has 32 divisors (see below), whose sum is σ = 60192926067456. Its totient is φ = 6645230436960.

The previous prime is 24999999999983. The next prime is 25000000000013. The reversal of 24999999999990 is 9999999999942.

It is a super-9 number, since 9×24999999999990⁹ (a number of 122 digits) contains 999999999 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1339754872 + ... + 1339773531.

It is an arithmetic number, because the mean of its divisors is an integer number (1881028939608).

Almost surely, 2^{24999999999990} is an apocalyptic number.

24999999999990 is an abundant number, since it is smaller than the sum of its proper divisors (35192926067466).

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

24999999999990 is a wasteful number, since it uses less digits than its factorization.

24999999999990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2679528724.

The product of its (nonzero) digits is 251048476872, while the sum is 105.

The spelling of 24999999999990 in words is "twenty-four trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety".