25511550542 has 32 divisors (see below), whose sum is σ = 40021337952. Its totient is φ = 12185800704.

The previous prime is 25511550541. The next prime is 25511550587. The reversal of 25511550542 is 24505511552.

It is a super-2 number, since 2×25511550542² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25511550541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 880478 + ... + 908990.

It is an arithmetic number, because the mean of its divisors is an integer number (1250666811).

Almost surely, 2^25511550542 is an apocalyptic number.

25511550542 is a deficient number, since it is larger than the sum of its proper divisors (14509787410).

25511550542 is a wasteful number, since it uses less digits than its factorization.

25511550542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28772.

The product of its (nonzero) digits is 50000, while the sum is 35.

The spelling of 25511550542 in words is "twenty-five billion, five hundred eleven million, five hundred fifty thousand, five hundred forty-two".