25029149940 has 72 divisors (see below), whose sum is σ = 76025732328. Its totient is φ = 6665299200.

The previous prime is 25029149933. The next prime is 25029150011. The reversal of 25029149940 is 4994192052.

25029149940 is a `hidden beast` number, since 2 + 502 + 9 + 14 + 99 + 40 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8740754064 + 16288395876 = 93492^2 + 127626^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37090 + ... + 226790.

It is an arithmetic number, because the mean of its divisors is an integer number (1055912949).

Almost surely, 2^25029149940 is an apocalyptic number.

25029149940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25029149940 is an abundant number, since it is smaller than the sum of its proper divisors (50996582388).

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

25029149940 is a wasteful number, since it uses less digits than its factorization.

25029149940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190449 (or 190444 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 25029149940 in words is "twenty-five billion, twenty-nine million, one hundred forty-nine thousand, nine hundred forty".